Tank going from 2-stroke fuel to 4-stroke fuel

brichey

Cadet
Joined
Apr 16, 2009
Messages
23
I am repurposing my long cruise tank going from 2-stroke fuel to 4-stroke fuel. The tank has been emptied and left to air out for quite a while. Can I simply slosh around a gallon or two of gas (gas-only) in the tank to help absorb any remaining oil residue as a way to make it ready for gas-only?
 

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
Joined
May 19, 2001
Messages
26,065
Re: Tank going from 2-stroke fuel to 4-stroke fuel

If it is clean and empty go ahead and use it......a small amount of oil will not hurt the 4 stroke
 

Beefer

Lieutenant Commander
Joined
Aug 4, 2008
Messages
1,737
Re: Tank going from 2-stroke fuel to 4-stroke fuel

x2

Might get a little bit of smoke, but I doubt even that.
 

cpubud

Chief Petty Officer
Joined
Jun 18, 2008
Messages
468
Re: Tank going from 2-stroke fuel to 4-stroke fuel

fill and go
 

5150abf

Vice Admiral
Joined
Aug 12, 2007
Messages
5,808
Re: Tank going from 2-stroke fuel to 4-stroke fuel

Concur, the tiny bit of oil left in the tank won't hurt anything, I have run 50:1 in my mower quite a few times , cars even and it doesn't hurt anything, wouldn't do it all the time but a little won't hurt.
 

Fireman431

Rear Admiral
Joined
Sep 17, 2007
Messages
4,292
Re: Tank going from 2-stroke fuel to 4-stroke fuel

Oil is suspended in gas with very, very little agitation. If you siphoned out the gas, you got the oil as well. Even in the off chance you left a pure 6 oz. of straight oil in there, reduced with 25 fresh gas would bring your ratio in the 500:1 range. Not enough for the engine to know it's there. Fill & go boating!
 
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