JPH05312051A - Outboard motor - Google Patents

Abstract

PURPOSE:To install an upper mount so compact in size by housing a rigid body part and an elastic body, being extended in both directions, constituting an upper vibro-isolating means, in a recess formed in the underside of a mount case from the lower part. CONSTITUTION:An oil pan 64 is installed in the lower part of an engine 21 of a outboard motor body 20. An upper vibro-isolating means 11 is composed of a rigid part 13 extending in both directions and an elastic body 12 installed so as to wrap this rigid part 13. A mount case 51 is interposed between the engine 21 and the oil pan 64. On the underside of this mount case 51, a recess 99 is formed which houses the rigid part 13 and the elastic body 12 after being installed from the lower part. Also an oil return passage 111 is formed being interconnected into the oil pan 64 from top to bottom of the mount case 51 avoiding the recess 99. Thus, an upper mount is installable so compact in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outboard motor equipped with a vertical crankshaft engine, and more particularly to a mount case thereof.

[0002]

2. Description of the Related Art A cylinder axis of an engine is substantially horizontal,
In an outboard motor with the crankcase located closer to the hull and the cylinder head located closer to the anti-hull, to support the outboard motor main body against vibration, place the upper mount at the rear of the vertical axis and set the support position. It is effective to adjust the angle to the torque roll axis. Further, in order to secure sufficient mount frame rigidity against impact load in the vertical direction, it is convenient if the left and right upper mounts form a closed loop. As one example, US Pat.
There is one known from the specification of 599,594. On the other hand, in a four-stroke engine outboard motor, an oil pan is generally located below a cylinder block of the engine so that the return of the lubricating oil flows down into the oil pan.

[0003]

However, in the case of the one disclosed in the above-mentioned US Pat. No. 3,599,594, 2
Since a stroke engine was installed and no consideration was given to lubricating oil, it could not be applied to a 4-stroke engine.

SUMMARY OF THE INVENTION An object of the present invention is to provide an outboard motor having an upper mount mounting structure and an oil return structure applicable to a four-stroke engine.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an engine having a crankshaft oriented in a substantially vertical direction and a cylinder oriented in a substantially horizontal direction, and a vertical shaft arranged below the engine. And an outboard motor main body comprising a case means for accommodating the propulsion means, an outboard motor mounting means for supporting the outboard motor main body and mounting it on the hull, and between the outboard motor mounting means and the outboard motor main body. And an anti-vibration means provided on the upper part of the engine, and an oil pan is provided below the engine, and the upper anti-vibration means is provided so as to surround the rigid body portion extending in the left-right direction. A mount case is provided between the engine and the oil pan, and a concave portion is formed on the lower surface of the mount case for accommodating the rigid body portion and the elastic body from below. With From the top to the bottom of the mount case, characterized in that to avoid the recess to form an oil return passage communicating with the oil pan. In the above, the engine is also characterized in that it is provided with a cylinder that expands into left and right V-shapes, and an oil return passage from each cylinder head is provided independently.

[0006]

[Operation] In the concave portion formed on the lower surface of the mount case interposed between the engine of the outboard motor and the oil pan therebelow,
Since the rigid body extending in the left-right direction and the elastic body that wraps the rigid body constituting the upper vibration-damping means are mounted from the bottom and accommodated therein, the upper mount is mounted so as not to affect the outer dimensions of the outboard motor body. It can be installed compactly. Moreover, since the oil return passage communicating with the oil pan is formed from the upper surface to the lower surface of the mount case while avoiding the upper mount recess, it is possible to obtain the oil return structure applicable to the 4-stroke engine mounting. Then, the oil from each cylinder head of the V-type engine is independently returned to the oil pan.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 showing an outboard motor A to which the present invention is applied, 1 is an outboard motor mounting means, and 20 is an outboard motor body. The outboard motor mounting means 1 includes a stern bracket 2 fixed to the stern of the hull B, and a swivel case 4 swingably supported by the stern bracket 2 via a tilt shaft 3 having a horizontal axis. A swivel shaft 5 rotatably supported by the swivel case 4 and having a substantially vertical axis, and upper and lower support members 6 integrally provided above and below the swivel shaft 5 to support the outboard motor body 20. 8 and. Further, the upper support member 6 is integrally provided with a mounting portion 7 for an operation handle or a remote control steering cable extending forward. The upper and lower support members 6 and 8 support the outboard motor body 20 via the vibration damping means 11 and 15, respectively.

The outboard motor main body 20 has a crankshaft 22 oriented substantially vertically and two cylinders 26 on one side above and below the bank.
26 is provided in the left and right V-shaped expansion toward the rear, and the V-type 4-cylinder 4-stroke engine 21 in which the V-shaped expansion angle of the left and right cylinder axes C, C is within 90 ° is arranged in the upper part. The case means 60 is assembled below the case means 60.
In the engine 21, 23 is a journal portion of the crank shaft 22, 24 is the same crank pin, 25 is the same crank web, 27 is a piston, 28 is a piston pin, 29 is a connecting rod, 31 is a crank case, 32 is a cylinder block, and 33 is Cylinder head, 34 is a cylinder head cover, 35 is a timing belt device, 36 is a cam shaft, 37
Is a rocker arm, 38 is an intake valve, and 39 is an exhaust valve. The V-type 4-cylinder 4-stroke engine 21 described above is covered with the engine cover 41.
Intake is performed from the air intake 42 provided on the inside of the V bank through the silencer 43, the carburetor 44, and the intake manifold 45 to the two left and right intake passages 46, 46 formed inside the V bank. Reference numeral 47 is a combustion chamber, 48 is an exhaust passage formed outside the V bank of the cylinder head 33, and 49 is an exhaust passage formed outside the V bank of the cylinder block 32.

A mount case 51 is integrally provided below the engine 21 by bolting to the lower surfaces of the crank case 31 and the cylinder block 32. In addition, 52 is a starter motor, 53 is a flywheel, 54 is a ring gear, and 55 is a crankshaft 22.
An oil pump provided at the lower end portion, and an oil filter 56. The case means 60 assembled below the V-type 4-cylinder 4-stroke engine 21 is the mount case 5.
1 Extension case 61 bolted to the bottom
And a gear case 71 bolted to the lower surface of the extension case 61.

The extension case 61 accommodates the vertical shaft 62 directly connected to the lower end of the crankshaft 22, and is connected below the vertical exhaust passages 49, 49 formed outside the V bank of the cylinder block 32. The exhaust pipes 63, 63 of the book and the oil pan 64 bolted to the lower surface of the mount case 51 are housed. Reference numeral 64a denotes an exhaust pipe support stay provided on the oil pan 64, 64b an oil drain bolt, 65 an upper mount lid integrally formed on the oil pan 64, 66 an oil strainer, 6
Reference numeral 7 is an oil pumping pipe, 68 is an oil suction passage formed in the cylinder block 32, and 69 is an oil discharge passage formed in the crankcase 31. The gear case 71 includes a driving bevel gear 7 at a lower portion of the vertical shaft 62 and a lower end portion thereof.
2. Propeller shaft 7 equipped with propeller 73 as a propelling means
4, a pair of driven bevel gears 7 for advancing and retreating the ends thereof
5,76 and dog clutch 7 for switching between forward and backward movements therebetween
7, eccentric clutch operating mechanism 78 and operating shaft 79
To store. The operation shaft 79 is the extension case 6
1 is projected from the lower part to the outside, penetrates through the swivel shaft 5, projects upward, and is connected to an operation system in the engine room.

Partition walls 81, 82 are formed in the extension case 61 and the gear case 71 to partition the partition shafts 81, 82 behind the vertical shaft 62.
The rear of 2 is an exhaust chamber 83. When the lower part of the outboard motor main body 20 is submerged in water, the exhaust gas in the exhaust chamber 83, when propelled by the propeller 73, passes through the exhaust hole 85 between the propeller shaft holder 84 of the gear case 71 and the propeller 73.
It is discharged into the water through the exhaust port 86 in the central portion. Further, the exhaust gas in the idling state of the engine 21 is discharged from the upper part of the exhaust chamber 83 through the exhaust passage 87 on the lower surface of the mount case 51 to the outside air from the exhaust port 88 on the upper part of the extension case 61.

In the gear case 71, a cooling water intake chamber 91 is formed around the lower part of the vertical shaft 62 in front of the partition wall 82, and a water pump 92 is provided above the cooling water intake chamber 91. The cooling water discharge port 93 is connected to the hose. Cooling water intake 95 provided in the upper mount lid 65 via 94
It is connected to the. As shown in FIGS. 3 and 4, the cooling water inlet 95 communicates with a cooling water passage 96 formed in the lower surface of the mount case 51, and the left and right through holes 96 a, 96.
It communicates with the cooling water passages 97, 97 on the upper surface side via a. Outside the cooling water passages 97, 97, drainage outlets 98, 98 penetrating the mount case 51 in the vertical direction are formed, and exhaust passages 89, 89 are formed next to them. The exhaust passage 89 is located above the cylinder block 32.
The exhaust pipe 63 is connected downstream to the exhaust pipe 49.

An upper mount recess 99 having an opening on the lower surface is formed at the center of the mount case 51, and the vibration isolation means 11 of the upper support member 6 is housed in the upper mount recess 99. ing. That is,
As shown in FIG. 5, the upper vibration isolator 11 stores an upper mount rubber 12 which is an elastic body in which a core metal 13 which is a rigid body extending in the left-right direction is embedded in a recess 99 for upper mount from below. The upper support member 6 left and right bifurcated arm portions 6a, 6a and the core bar 13 to the bolt nut 14,
It is connected by 14. After that, the recess 99 is closed by the upper mount lid 65 bolted to the lower surface of the central portion of the mount case 51. The upper mount lid 65 is provided with extension legs up to the vibration-proof rubber 11 if necessary. In addition, in FIG. 5, the upper mount rubber 11 is bilaterally symmetrical.

Further, a lower mount through hole 101 is formed in the lower side portion of the extension case 61 and opens on both left and right side surfaces. Inside the lower mount through hole 101, the lower support member 8 is protected. The shaking means 15 is stored. That is, as shown in FIG. 6, the lower vibration isolation means 15 penetrates the upper mount rubber 16 which is an elastic body in which the core bar 17 which is a rigid body portion extending in the left-right direction is embedded from one side to the lower mount rubber. Inserted into the mouth 101, the lower support member 8 has left and right bifurcated arm portions 8a, 8a and a core metal 17
And collars 18 and 18 with bolts and nuts 19,
It is connected by 19. After that, the through hole 101 is closed by the lid members 102 and 102 which are bolted to the left and right side surfaces of the extension case 61. Reference numeral 103 denotes a reinforcement portion of the extension case formed in the opening front portion of the through hole 101 so as to be substantially flush with the lid member 102.
In addition, in FIG. 6, the lower mount rubber 15 is symmetrical.

Further, in the mount case 51, as shown in FIGS. 1, 3 and 4, a main oil return port 111 is formed on the rear side opposite to the upper mount recess 99 with the cooling water passage 96 interposed therebetween. In addition, a concave wall surface 112 that opens to the upper surface and a concave wall surface 113 that opens to the lower surface are formed. Sub oil return passages 114, 114 are formed on the left and right sides of the upper mount recess 99 on the lower surface, and are formed in the front-rear direction with the heat insulating space 51a closed by the upper mount cover portion 65 interposed therebetween. Has been done. In FIG. 3, reference numeral 115 is a coupling surface with the crankcase 31, and 116 is a coupling surface with the cylinder block 32. Further, in FIG. 4, 117 is a coupling surface with the oil pan 64 and the upper mount lid 65, and 118 is a coupling surface with the extension case 61.

Next, the oil circulation path of the engine 21 will be described. First, the oil in the oil pan 64 is removed by the oil pump 55 provided at the lower end of the crankshaft 22.
The oil pumped up through the strainer 66, the pumping pipe 67, and the suction passage 68 and discharged to the discharge passage 69 passes through the oil passage 121 formed in the crankcase 31, the oil passage 122 formed in the cylinder block 32, and the cylinder head 33. Through the oil passage 123 formed in
It is supplied to the necessary lubrication section. Then, the oil in the crankcase 31 that has been used for lubrication drops into the oil sump recess 112 that opens on the upper surface of the mount case 51, and then flows into the oil return port 111 that is the main oil return passage and the sub oil return passages 114 and 114. The oil flowing in and oil from the cylinder block 32 side and the cylinder heads 33, 33 side directly drops to the left and right of the main oil return port 111 (see phantom lines 124, 124 in FIG. 3). The sub oil return passages 114, 114 are effective for returning oil when the outboard motor is tilted up.

Next, the cooling water circulation path of the engine 21 will be described. First, the water in the water channel is removed by the water pump 92 provided below the vertical shaft 62.
1, a cooling water intake chamber 91, a cooling water discharge port 93, and a hose 9
4 through the cooling water inlet 95 of the upper mount lid 65 to the cooling water passage 96 on the lower surface of the mount case 51.
And is sent to the cooling water passages 97, 97 on the upper surface side via the left and right through holes 96a, 96a. The cooling water passages 97, 97 are provided on the side portions of the exhaust passages 49, 49.
The cooling water passages 131, 1 which are open to face and communicate with each other.
31 thus forming cooling water in the cylinder block 1
Each of the cylinders 2 passes through the cooling water passages 131, 131 formed side by side in the exhaust passages 49, 49 outside the V bank 31.
6 ... Cooling water passage 132 formed in the periphery, each exhaust passage 48 of the cylinder head 33 ... Cooling water passage 1 formed in the periphery
33 ... And each combustion chamber 47 ... Cooling water passage 1 formed around
It flows to 34 ...

Thus, the hot water used for cooling is supplied to both cooling water passages 131 on the outside of the V bank of the cylinder block 31.
The water is discharged into the extension case 61 from the drain ports 98, 98 of the mount case 51 through the drain passages 135, 135 formed side by side in 131. Note that FIG.
Reference numeral 136 is a thermostat provided between the cooling water passage 132 and the drain passage 135. Further, the exhaust passage 87 on the lower surface of the mount case 51 formed between the upper portion of the exhaust chamber 83 in the extension case 61 and the exhaust port 88 is
As shown in FIG. 4, it is partitioned into a chamber 87a around the coupling surface 117 with the oil pan 64 and a chamber 87d communicating through a through hole 87c formed in the partition wall 87b behind the chamber 87a. A porous packing P is interposed between the passage 87 and the extension case 61.

According to the outboard motor having the above structure,
With respect to the upper mount portion of the mount case 51 below the engine 21, an upper vibration isolating means in which a core metal 13 extending in the left-right direction is embedded in the upper mount rubber 12 in an upper mount recess 99 formed in the lower surface of the central portion of the mount case 21. The upper mount can be mounted compactly without affecting the outer dimensions of the outboard motor body 20 because the housing 11 is mounted from below. And the support member 6
Since the left and right arm portions 6a, 6a and the core metal 13 of the upper mount rubber 12 form a closed loop, a rubber frame having sufficient rigidity against a vertical impact load generated at the time of jumping. Has become.

Moreover, in the mount case 51, the main oil return port 111 and the sub oil return passage 11 which communicate with the inside of the oil pan 64 while avoiding the upper mount recess 99.
Since the Nos. 4 and 114 are provided, as in the embodiment, the V-type 4
It is equipped with an oil return structure suitable for an outboard motor equipped with a 4-stroke engine 21 such as a cylinder.
Then, the cylinder block 32 side and the cylinder head 3
The oil from the 3, 33 side is shown in FIG.
As shown in FIG. 4, it can be dropped directly to the left and right of the main oil return port 111 of the mount case 51 and returned independently in the oil pan 64. In the above embodiment, the oil flows into the left and right of the main oil return port 111 and returns into the oil pan 64.

7 to 9 show another embodiment of the return passage. In this embodiment, the oil is returned to the main oil return port 111.
Independent oil return passages 215 and 216 are provided on the left and right sides of the oil passage so that the oil is independently introduced and returned into the oil pan 64. Also in this embodiment, the structure of the outboard motor is basically the same as that described above, and therefore detailed description thereof will be omitted, and necessary symbols will be described.

7 to 9, 21 'is an engine, 32a is a return passage from the crank chamber of the cylinder block, R1 and R2 are left and right cam chambers, and 201 and 202 are oils provided in the left and right cylinder heads. Return passage, 2
03 and 204 are oil return passages to the left and right cam chambers, 2
Reference numerals 05 and 206 denote oil return passages provided in the left and right banks of the cylinder block, and reference numerals 207 and 208 denote openings (block outlets) of the oil return passages. Also, 209,
211, 210 and 212 are packing surfaces (walls) provided on the lower surface of the cylinder block, and recesses 213 and 214.
Is the packing surface (wall) provided on the upper surface of the mount case,
Reference numerals 215 and 216 denote the above-mentioned oil return passages which vertically penetrate the mount case, and 217 and 218 denote left and right oil return pipes attached to the mount case.
219 and 220 are outlets of the pipe.

In the above, the return oil from the cam chamber is guided into the oil pan by the cylinder block and the walls 209, 210, 211 and 212 of the mount case without joining with the return oil from the crank chamber.
Further, the left and right pipes allow the oil to return to the vicinity of the suction port of the strainer communicating with the suction side of the oil pump, so that the oil can be smoothly returned to the oil pan even by the suction force of the pump. or,
Since the left and right pipes are independent, the oil can be smoothly returned even if the outboard motor is slightly tilted to the left or right. The pipes and the like can be appropriately shared or omitted.

By the way, in the embodiment, the detailed structure of each part has been described, but it goes without saying that the specific detailed structure can be appropriately changed.

[0025]

As described above, according to the outboard motor of the present invention,
In the recess formed on the lower surface of the mount case interposed between the engine and the oil pan below it, the rigid body extending in the left-right direction constituting the upper vibration isolation means and the elastic body wrapping the rigid body are mounted from below. Since it is accommodated, the upper mount can be mounted compactly without affecting the outer dimensions of the outboard motor body, and the upper mount recess is avoided from the upper surface to the lower surface of the mount case inside the oil pan. Since the oil return passage communicating with the engine is formed, it is possible to provide an oil return structure that can be applied to a 4-stroke engine. Then, the oil from each cylinder head of the V-type engine
It can be returned to the oil pan independently.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an outboard motor to which the present invention is applied.

FIG. 2 is a cross-sectional view of the engine portion.

FIG. 3 is a plan view of a mount case portion.

FIG. 4 is a bottom view of the mount case portion.

FIG. 5 is a partially cutaway plan view of the upper mount portion.

FIG. 6 is a cross-sectional view of a lower mount portion.

FIG. 7 is an explanatory view of an engine of another embodiment, looking up from below.

FIG. 8 is a plan view of a mount case according to another embodiment.

FIG. 9 is an enlarged sectional view of an essential part of an oil suction and return port portion of the another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outboard motor mounting means, 6 ... Upper side supporting member, 6a ... Arm part, 8 ... Lower side supporting member, 8a ... Arm part, 11 ... Upper side vibration isolating means, 12 ... Elastic body, 13 ... Rigid body part, 15 ... Lower vibration isolator, 16 ... Elastic body, 17 ... Rigid body section, 20 ... Outboard motor body, 21 ... Engine, 22 ... Crankshaft, 26 ... Cylinder, 31 ... Crankcase, 32 ... Cylinder block,
33 ... Cylinder head, 51 ... Mount case, 60 ...
Case means, 61 ... Extension case, 62 ... Vertical shaft, 64 ... Oil pan, 71 ... Gear case, 7
3 ... Propulsion means, 99 ... Upper mount recess, 101
... Lower mount through-hole, 111 ... Main oil return passage, 114 ... Sub oil return passage, B ... Hull.

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[Procedure amendment]

[Submission date] March 24, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a central cross section showing an outboard motor A to which the present invention is applied.
Fig. 2, Fig. 2 is a cross-sectional view of the engine part, and Fig. 10 is the main engine.
Fig. 11 is an external view of the outboard motor according to Ming, and Fig. 11 is its vibration isolation means.
FIG. In FIG. 10, 20 is the outboard motor body
Yes, it is attached to the stern of the hull B by the outboard motor attachment means 1.
ing. 1 and 2, the outboard motor mounting means 1 swings through a stern bracket 2 fixed to the stern of the hull B and a tilt shaft 3 having a horizontal axis line on the stern bracket 2. A swivel case 4 supported so that it is possible, a swivel shaft 5 rotatably supported by the swivel case 4 and having a substantially vertical axis, and an outboard motor main body integrally provided above and below the swivel shaft 5. Two
It is composed of upper and lower support members 6 and 8 for supporting 0. Further, the upper support member 6 is integrally provided with a mounting portion 7 for an operation handle or a remote control steering cable extending forward. As shown in FIG. 11, the upper and lower support members 6 and 8 are provided with vibration-proof means (vibration-proof rubber) 11, 1.
The outboard motor main body 20 is supported via the respective five.
Returning to FIGS. 1 and 2, the description will be continued. In addition, 1
See FIG. 11 for 1 and 15.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

Next, the oil circulation path of the engine 21 will be described. First, the oil in the oil pan 64 is removed by the oil pump 55 provided at the lower end of the crankshaft 22.
The oil that has been pumped up through the strainer 66, the pumping pipe 67, and the suction passage 68, and discharged to the discharge passage 69 after the oil filter passes through the oil passage 121 formed in the crankcase 31 and the oil passage formed in the cylinder block 32. It is supplied to the necessary lubrication portion through 122, the oil passage 123 formed in the cylinder head 33, and the like. Then, the oil in the crankcase 31 used for lubrication and
The oil from the cylinder head is on the upper surface of the mount case 51.
To the main oil return port 111 and the auxiliary oil return port.
It flows into the paths 114, 114. The sub oil return passage 1
14 and 114 are effective as oil return when the outboard motor is tilted up.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG. 1 is a side sectional view of a center of an outboard motor according to the present invention.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 10

[Correction method] Added

[Correction content]

FIG. 10 is an external view of an outboard motor according to the present invention.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 11

[Correction method] Added

[Correction content]

FIG. 11 is an explanatory view of an anti-vibration means for an outboard motor according to the present invention.

[Procedure Amendment 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Added

[Correction content]

[Figure 10]

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Added

[Correction content]

FIG. 11

Claims (2)

[Claims] 1. An outboard motor body comprising an engine having a crankshaft oriented in a substantially vertical direction and a cylinder oriented in a substantially horizontal direction, a vertical shaft arranged below the engine, and a case means for accommodating a propulsion means. An outboard motor comprising: an outboard motor mounting means for supporting the outboard motor body and mounting the outboard motor body to a hull; and an anti-vibration means interposed between the outboard motor mounting means and the outboard motor body. An oil pan is provided below the engine, and the vibration isolator on the upper side is composed of a rigid body portion extending in the left-right direction and an elastic body provided so as to wrap the rigid body portion, and the engine and the oil pan are provided. The mount case is installed between the
A recess for accommodating the rigid body portion and the elastic body from below is formed, and an oil return passage communicating with the inside of the oil pan while avoiding the recess is formed on the upper surface and the lower surface of the mount case. And outboard motor. 2. The engine is provided with a cylinder that expands into a left and right V-shape, and an oil return passage from each cylinder head is independently provided.
The outboard motors listed.