Ficht 90hp spark plugs problem,need help!

[favre04]

I have a ficht 90hp 2001 and after each 8 hrs of trolling the 4 spark plugs get burned and full of ****! So, I have to clean them. Any idea of what could cause this?

 

[wilde1j]

Re: Ficht 90hp spark plugs problem,need help!

Sure, the plugs MUST be indexed, or what you experienced WILL happen.

See here:
http://www.boatsetup.com/PlgIndexing.html

 

[Faztbullet]

Re: Ficht 90hp spark plugs problem,need help!

Several things:
1) engine temperature not correct.
2) oil pump should be checked as a pinhole in the diaphragm can cause leakage into a cylinder.
3) oil pressure is too high from a restricted return line.
4) internally leaking oil injector.
5) faulty oil pressure regulator
6) plugs not indexed

 

[wilde1j]

Re: Ficht 90hp spark plugs problem,need help!

Agree with the other five possible causes as well.

 

[seahorse5]

Re: Ficht 90hp spark plugs problem,need help!

What oil are you using?

What is your top rpm with an average load in the boat?

What sparkplug and gap?

What is the engine model number?