Fuel Octane recommendation

[Deerdog]

Hey guys,<br />Man have I learned alot on this forum. thaks to all the smart ones out there and I hope I can be helpful also.<br /><br />Anyway, I am the one with the 150 Force that is currently in the shop (see previous post awws-----t, itgotme). One of the posts got me thinkng. I try to run 92-93 Octane fuel in the boat as it seems to run best on that octane rating. I have read an intersting debate a while back on 87 vice higher ratings. I am now thining that maybe the higher octane I have been running may be the cause and my problem may very well be fuel related (gumming of the carbs). <br /><br />What fuel do you all recommend (or are running) in similar outboards. Mine is an 89 Force 150, on the back of an 89 Arriva boat. I have always been told that the Force notors need good clean gas, as well as oil. I run Quicksilver TCW-3 oil (calls for TCW-2 or better). Would be very interested in any advice or recommendations.<br /><br />Thanks<br />Deerdog

 

[Capt Al]

Re: Fuel Octane recommendation

I recently purchased a new 50hp 4-stroke and was told by dealer (confirmed in owner's manual) to run 87 octane. I must admit though that I have been running 89 since that is what I use in my truck. I've been told that using 91 or 93 octane can cause problems with OBs but I don't know what specifically.