2 stroke yamaha gas/oil mix question

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2 stroke yamaha gas/oil mix question

Postby 2takem » Mon Oct 07, 2013 12:03 pm

Also posted this in the boat section as well....

Ok guys. I bought my first boat recently and when I bought the boat the gentleman said to mix 50:1 for gas/oil. However, on the side of the motor it stats 100:1 and so does the book. Now, to me I should use the 100:1 as the book and motor states.

Am I missing something? Is there a reason he was using 50:1?
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Re: 2 stroke yamaha gas/oil mix question

Postby Feelin' Fowl » Mon Oct 07, 2013 12:48 pm

I don't have experience with the boat motor in question, but most small motors use a 50:1 mix. Think of a weed whacker.

He may have confused ratios...
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Re: 2 stroke yamaha gas/oil mix question

Postby 2takem » Mon Oct 07, 2013 12:50 pm

I should have noted its a 25hp Yamaha 2-stroke.
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Re: 2 stroke yamaha gas/oil mix question

Postby malrdmasher » Mon Oct 07, 2013 1:56 pm

What year motor.? Older motors had diff mix ratios. As oil was different many yrs ago. For example I had an old 78 I think. 28 hp that said 32:1 mix. But with the advancement in oils the mix is now 50:1 today.


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Re: 2 stroke yamaha gas/oil mix question

Postby 2takem » Mon Oct 07, 2013 2:24 pm

the motor is a 2007...
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Re: 2 stroke yamaha gas/oil mix question

Postby sureshot 612 » Mon Oct 07, 2013 2:54 pm

when and were did you buy the motor i picked one up the same year a few weeks ago , and i called yam. and asked them the same thing ,i have the book and it says 100-1 .i have there # if you want it
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Re: 2 stroke yamaha gas/oil mix question

Postby riverrat47 » Mon Oct 07, 2013 4:55 pm

I have an `85 Evinrude, 25 horse, that was supposed to be a 100/1 mix, after the first two tanks (50/1). I was on my 3rd or 4th tank at 100/1 and it was knocking some. I asked my mechanic about it and he said to go back to 50/1 and stay there. Around ` `88 or later, OMC came out and said "OOPS, we shouldn't have gone so lean. Never mind. Go to 50/1." No new manual, no help if you had messed up your motor, just a letter. Luckily, I must have caught it on time. That may be the case with your yammy, too.
Call or email the company. They may tell you to go stronger, or maybe not. Sometimes a company will NEVER admit an error, so I'd call an outboard mechanic and ask them, too. If you don't know a good outboard mechanic, check with several. Why more than one? Well, in over 30 years of using and beating up outboards on a daily basis, I've found that there are a few individuals that call themselves outboard mechanics that couldn't find their butts with both hands.
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Re: 2 stroke yamaha gas/oil mix question

Postby sureshot 612 » Mon Oct 07, 2013 5:45 pm

the manuel that came with the motor said 50-1 for break in and 100-1 after that like i said i have the # if you want to call but have the model # and serial # when you call the guy at yam. looked it up when i called . leave nothing to chance there is a lot of know it alls out there , you are the one paying the repair bills. some will give you advise and it is up to you to get the right answer, i hope this helps ,and nothing bad to others. and manuals can be pulled up on line
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Re: 2 stroke yamaha gas/oil mix question

Postby sureshot 612 » Tue Oct 08, 2013 10:46 am

PM sent
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Re: 2 stroke yamaha gas/oil mix question

Postby MOSSBERG935 » Thu Oct 17, 2013 7:29 pm

I have a 2002 Yamaha 9.9....I use the 100:1 and have no problems. It was explained to me, "Yamaha's tolerances are tighter than most other outboards and 100:1 is recommended".
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Re: 2 stroke yamaha gas/oil mix question

Postby sureshot 612 » Thu Oct 17, 2013 11:59 pm

so what type of oil do you use
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Re: 2 stroke yamaha gas/oil mix question

Postby 2takem » Fri Oct 18, 2013 9:27 am

Sureshot I thought I sent you a PM....My bad

Its Yamaha oil Yamalube for 2-stroke.
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Re: 2 stroke yamaha gas/oil mix question

Postby MOSSBERG935 » Fri Nov 22, 2013 4:13 pm

Yamalube 2 stroke oil
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