fuel/oil mix ratio

[radar750]

Just aquired and old Glastron with a 1980 150 hp Johnson. Cant find any model or seriel # and a search did not turn up any info for a oil/gas mix ratio. All my other motors were 50/1 but some one said this motor may be 100/1. With the info that I have would anyone know what the proper mix would be. Thank you.

 

[bubbakat]

Re: fuel/oil mix ratio

really need your model no so to know how old she is but up to 64 i think was 24:1 then after 50:1 but that 100:1 was revised to 24:1 or 32:1

 

[radar750]

Re: fuel/oil mix ratio

Bubba, I could not find M and S but may have looked in wrong place, any suggestions.

 

[Xcusme]

Re: fuel/oil mix ratio

Radar, <br />I see you have a 1980 motor. You will just fine staying at a 50:1 fuel/oil ratio. Pre-1963 motors often required 24:1 32:1 mixes due to bearing designs. For a short time, OMC suggested a 100:1 mix , but later rolled it back to 50:1. Some use the 100:1 mix for trolling to minimize plug fouling, but can be risky at higher RPM's, there's simply not enough lubrication at that ratio to insure adequate cooling and lubrication .

 

[bubbakat]

Re: fuel/oil mix ratio

radar I am sorry for the mix up and excuseme saw that you had your year already posted.<br />I have no idea where my thinking cap was at. But as always someone on this board comes through<br /><br />

 

[radar750]

Re: fuel/oil mix ratio

xcuse, thank you for the info<br />bubba, your right this place is great, someone always helps you out. Thanks Guys