wakemaker

I have a OS 21 XM Outboard motor, and i guess my question is that i've heard different storys on what fuel to use. I've heard use 20 to30 percent to break it in then you can move up to a higher percent. And i've heard that you should break it in with the fuel you intend on running it with. Meaning if i'am goning to run 65 percent then i should use it to break it in with. Would like to no what is the right way. Thanks

piper_chuck

My Feedback: (12)

As with many things, there are differing opinions. I broke mine in with 50% fuel, which is what I race with. I started out with it somewhat rich and gradually leaned it out.

wave waker

though nitro % matters but the most important is the % of oil at least 18%, just my 2cents.

misshydro

Hay wave waker!! I use trinity moster horsepower fuel 20%nitro and 18% oil.Thats what alot of guys use to breakin there motor first.Then after you breakin your motor then bump up your nitro % higher.

Ron Olson

My Feedback: (1)

Ask 100 people, get 100 answers. I run what I have and that's usually the fuel that I'll use all the time. The same thing with engine break-in. I run mine rich then slowly lean it out after a few tankfuls. One buddy "heat cycles" his engines, running wide open on the straights then slows down on wide turns.

f16man

You might want to give that new engine a chance to loosen up a bit with a gallon of 20% nitro and 18% oil, some castor is good protection too. Also the engine will be easy to tune and keep running wile you are trimming and learning your to pilot your new boat; big time nitro is expensive and if your not looking for that extra 10 to 20% power increase the lower nitro fuel will be fine. run her rich and keep it cool and have fun!!!!!

330T

I've always broke in what i run %50 and %12 oil. High nitro fuel gets you a bit more power but also make tuning much harder as setting become very touchy.

Drmeff

So what is the deal with the Trinity "Break In" fuel.... just higher oil content?

Believe It

i break my motors in with the fuel i always run also, which is Odonnell 10%


and i dont really think there is a whole lot of power to be gained by going with a high % of nitro in alot of motors. I barely lost any speed (less then 1mph) going from 40% to 10% in my cat with the K&B motor.

saleens7

ive heard that break n fuel should be low nitro, high oil content fuel...but i broke my SW in with 30% nitro and 14 or 16% oil (and still use it) and its been running fine..