225 Johnson oil in fuel

bighh7

Seaman
Joined
Sep 13, 2011
Messages
53
Ive got a 225 Johnson and am getting oil in my racor , the fuel is clean in the tank but it seems to be feeding oil into my fuel line and going back to the racor , any ideas ?
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 225 Johnson oil in fuel

Is this after the mtr has been sitting for some time or what?? Model # would also help.
 

bighh7

Seaman
Joined
Sep 13, 2011
Messages
53
Re: 225 Johnson oil in fuel

Theowner runs the boat often , but lets say yessitting for a while . This is only on the stb engine and not the port one .
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 225 Johnson oil in fuel

Check the fill cap on the oil tank to make sure it's venting. If the oil tank builds up pressure when sitting it can cause this prob.
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: 225 Johnson oil in fuel

Check the fill cap on the oil tank to make sure it's venting. If the oil tank builds up pressure when sitting it can cause this prob.
I'm not a JohnyRude guy but on the Mercs there's a check valve in the fuel line before the pump. Might be one on yours too. Check the manual.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 225 Johnson oil in fuel

JohnyRudes don't have them.
 

bighh7

Seaman
Joined
Sep 13, 2011
Messages
53
Re: 225 Johnson oil in fuel

Thanks for the advise , yes the cap was not venting . Thanks for the tip
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 225 Johnson oil in fuel

Thanks for the come back. Good to know you found the prob.
 
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