Mounting structure for internal combustion engine on small planing boat

Abstract

Providing a mounting structure for an internal combustion engine on a small planing boat on which an internal combustion engine for driving a jet propulsion pump is mounted, in a boat body between a hull and a deck, with a crankshaft thereof oriented in a front-rear direction of the boat body and on which a cylinder of the internal combustion engine is slantly disposed to one of left and right sides of the boat body, the mounting structure taking a weight balance of the internal combustion engine into account. A distance between an axis of the crankshaft and one mounting bracket arranged on a side where the cylinder of the internal combustion engine is slantly disposed, is longer than a distance between the axis of the crankshaft and the other mounting bracket arranged on the opposite side thereof.

1 . A mounting structure for an internal combustion engine on a small planing boat for mounting an internal combustion engine for driving a jet propulsion pump, in a boat body between a hull and a deck, with a crankshaft thereof oriented in a front-rear direction of the boat body and on which a cylinder of the internal combustion engine is slantly disposed to one of left and right sides of the boat body, comprising:
 a distance between an axis of the crankshaft and one mounting bracket arranged on a side where the cylinder of the internal combustion engine is slantly disposed, is longer than a distance between the axis of the crankshaft and the other mounting bracket arranged on the opposite side thereof.   
   
   
       2 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 1 , wherein an intake port is provided on the side where the cylinder of the internal combustion engine is not slantly disposed. 
   
   
       3 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 1 , wherein a vertical plane V passes through the axis of the crankshaft and an axis C of the cylinders is displaced at an angle relative to the vertical plane V. 
   
   
       4 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 1 , wherein the small planing boat includes left and right mounts that are substantially perpendicular to the vertical plane V. 
   
   
       5 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 4 , and further including left and right mounting brackets secured to respective left and right mounts, said left and right mounting brackets being secured to said internal combustion engine for positioning the internal combustion engine at an angle relative to said left and right mounts. 
   
   
       6 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 5 , and further including vibration insulators operatively positioned between respective left and right mounts and left and right mounting brackets. 
   
   
       7 . The mounting structure for an internal combustion engine on a small planing boat according to  claim 1 , wherein mounting the internal combustion engine at an angle enables the internal combustion engine to be removed from the small planing boat without removing an intake pipe or an intake device. 
   
   
       8 . A mounting structure for an internal combustion engine on a planing boat comprising:
 an internal combustion engine for driving a jet propulsion pump, said internal combustion engine being mounted in a boat body between a hull and a deck;   a crankshaft operatively connected to the internal combustion engine, an orientation of the crankshaft being in a front-rear direction of the boat body and on which a cylinder of the internal combustion engine is disposed at an angle to one of left and right sides of the boat body;   a distance between an axis of the crankshaft and one mounting bracket arranged on a side where the cylinder of the internal combustion engine is disposed at an angle being longer than a distance between the axis of the crankshaft and the other mounting bracket arranged on the opposite side thereof.   
   
   
       9 . The mounting structure for an internal combustion engine on a planing boat according to  claim 8 , wherein an intake port is provided on the side where the cylinder of the internal combustion engine is not disposed at an angle. 
   
   
       10 . The mounting structure for an internal combustion engine on a planing boat according to  claim 8 , wherein a vertical plane V passes through the axis of the crankshaft and an axis C of the cylinders is displaced at an angle relative to the vertical plane V. 
   
   
       11 . The mounting structure for an internal combustion engine on a planing boat according to  claim 8 , wherein the planing boat includes left and right mounts that are substantially perpendicular to the vertical plane V. 
   
   
       12 . The mounting structure for an internal combustion engine on a planing boat according to  claim 11 , and further including left and right mounting brackets secured to respective left and right mounts, said left and right mounting brackets being secured to said internal combustion engine for positioning the internal combustion engine at an angle relative to said left and right mounts. 
   
   
       13 . The mounting structure for an internal combustion engine on a planing boat according to  claim 12 , and further including vibration insulators operatively positioned between respective left and right mounts and left and right mounting brackets. 
   
   
       14 . The mounting structure for an internal combustion engine on a planing boat according to  claim 8 , wherein mounting the internal combustion engine at an angle enables the internal combustion engine to be removed from the planing boat without removing an intake pipe or an intake device.