octane atleast 89 !

[GetReel]

what octane gas do you use in your engine? mid grade atleast with the older engine's ! 87 is p ss water! my 2 cents........

 

[lark2004]

Re: octane atleast 89 !

regular (that's 92 here in Australia)<br /><br />hmmm, think this post could be a troll... <br /><br />I mean, you want to know what fuel people use, but add the statement of "midgrade in older engines" That bit isn't a question, it's a pot stirrer.

 

[BoatBuoy]

Re: octane atleast 89 !

It makes no difference what I run in mine. You obvoiusly already have an opinion.

 

[OBJ]

Re: octane atleast 89 !

Been running 87 in my 84' 50 horse Johnny and 86 90 horse Rude for the past 5 years. Tried 89 once or twice....didn't make any difference I could see.

 

[surlyjoe]

Re: octane atleast 89 !

1960 big twin...tried 89, doesn't run any better than 86.

 

[ob15]

Re: octane atleast 89 !

Do a search and you will see it is recommended to use 87 octane. The higher octane fuels have additives that 2 stroke outboard don't like too much.

 

[Mod2]

Re: octane atleast 89 !

Moving to Outboard Non-Repair Discussion Forum.

 

[Dhadley]

Re: octane atleast 89 !

First you have to identify what 2 stroke outboard you're talking about. There were some Merc's produced up until the early to mid 80's that need more octane. <br /><br />If we're talking about recreational outboards produced in the last 20 years, and using them as produced, then 87 is all they require. <br /><br />If you're talking about a recreational motor that's been modified, or a factory race motor, that's a whole different story.

 

[budsbud66]

Re: octane atleast 89 !

The answer to this is actually extremely easy, and will be different for everyone.. Most non-performance will run 87 fine..<br /><br />You definatly need to get a compression test and see what ratio your running at, only then can you determine what octane gas to run.. <br /><br />Running a higher octane gas on a low compression engine does absoultly nothing for preformance, or longevity of the motor.. <br /><br />However if you have high compression and you run low grade gas you will get a ping sound from your engine call pre-detonation. kinda sounds like stones being thrown at your motor. This isnt fatal, but use it as a warning to bump up a few octane.. <br /><br />so save your pennies.<br /><br />- team_starcraft -

 

[WillyBWright]

Re: octane atleast 89 !

You also have to find out how they get that extra octane. It's usually by adding ethanol to it. 2-stroke oil and alcohol don't get along. The more there is, the worse it gets. Best to avoid those.

 

[budsbud66]

Re: octane atleast 89 !

very agreed willy, anything that was built pre-2000 really isnt made for that ethnol crap, Unfortately if you live in a big city you dont have much choice.<br />i will not run it in anything i own, Its not that one tank is going to kill your motor. But the motor was not built for it. it burns at a different temp.<br />also im pretty sure all kwik-trip gas has 10% or more ethanol... so stay away from kwik-trips..