4 Strokes Tohatsu 15 HP motor.-

[Sea Rider]

A friend of mine has this 4 year oldie used as a water transport fom pier to vessel and vice versa at just at fast idle speed, it's rarely flushed with fresh water after use as lives moored to a pier. The motor runs with some hesittion when giving throttle, the employee in charge said that the upper spark when removed comes out wet, according to his tongue it's salt water ?

Assume that cooling salt water its making its way through the cylinder head gasket or exhaust cover as this motor has not gone through a gasket retorque to factory specs over the 4 years in use. Besides both gaskets what else should be checked for water intrusion into the cylinder ?

Happy Boating

 

[pvanv]

You might replace

3BJ010050M

GASKET, CYLINDER HEAD F15C/F20C

$24.23

 

[Sea Rider]

You might replace

3BJ010050M

GASKET, CYLINDER HEAD F15C/F20C

$24.23

Thanks Paul,

What about the exhaust cover gaskets if the motor happens to have a exhaust cover ? If the motor is making oil could it be related to having water intrusion in the cylinder ?

Happy Boating

 

[pvanv]

There is indeed an exhaust cover. The telltale comes out of it. The gasket, if needed, is:

3R3023050M

GASKET, EXHAUST COVER

$6.85

Making oil would not cause salt to get into the cylinder.

 

[Sea Rider]

Thanks Paul, will retorque both gaskets with a torquemeter, if issue continues proper time to replace both..

Happy Boating