Oil to gas ratio

imafishingfred

imafishingfred

Cadet
Joined
Sep 24, 2004
Messages
25
Not sure if my oil injection is working (VRO) on my 1988 Johnson GT150. I plan to put a mark on the tank to see if it drops, but for the time being, I want to mix the oil in with the gas. I know it will smoke and foul out the plugs, but its insurance. What ratio oil to gas should I be running? Any other suggestions would be appreciated.
 
H

hidef

Lieutenant
Joined
Aug 22, 2009
Messages
1,465
Re: Oil to gas ratio

Pre-mix 50:1 if the VRO is working you will be running 25:1 it will smoke a little but it won't the engine and you shouldn't foul the plugs considering that was the recommend break-in procedure when the engine was new.
 
W

wired247

Lieutenant Commander
Joined
Oct 8, 2011
Messages
1,557
Re: Oil to gas ratio

I built a new engine and ran 40:1 with penzoil. I'd get about and hour of run time before fouling plugs. Never again!
 
C

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,149
Re: Oil to gas ratio

Hey Wired, That should not have happened at 40::1. Did you have other issues with that motor?
 
R

ritamigo

Seaman
Joined
Mar 16, 2012
Messages
62
Re: Oil to gas ratio

I don't know if this helps, but for 5 gallons of gas use 12.8 oz of oil. That is 10 to 1. Although to me it sounds like it should be more oil.

JoeVee
 
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