98 Johnson 225 Venom

[Bendeguz]

Hey all

I had my boat out yesterday and noticed that the motor was smoking a bit more than usual. I know on cold start ups it is normal to see smoke until it warms up but this happened when i was coming back to the launch at low rpms and speed.

I read about the vro units on these motors and some folks had to rebuild the pump in order to get rid of the excessive smoke. Is there a way to adjust the injection percentage on these units or anywhere else on the motor to adjust the mixture?

At high RPMs the motor runs fine, I also noticed that the primer bulb is never really firm, so maybe i have a leak somewhere and this is why the oil injection is compensating with injecting more oil than normal? Like I said it only smokes at low RPMs.

The motor has about 30 hours on it since it was re-built. I had another problem which was the shift assist switch that i ordered and replaced cus the old one was sticky.
Any feed back and ideas would be great, thanks

Lester

 

[clanton]

Re: 98 Johnson 225 Venom

Could be a lot of things. Check all fuel lines from pump to tank, any air leaks causes pump to pump more oil.

 

[Bendeguz]

Re: 98 Johnson 225 Venom

Hey Clanton thanks for the reply, All the fuel lines are new inside the engine what i might suspect is the primer bulb or the connection to the primer bulb. I will replace the bulb and at least i can trace it back to the tank.

What else could cause the excess oil are there any other factors that would do this?

Thanks again
Lester

 

[clanton]

Re: 98 Johnson 225 Venom

Fuel restriction, but this engine has an alarm for that. Alarm system work?