engine help
 

I need some help here
I have been running omega blend morgan fuel with 10% nitro in my os 60 fp engine. I have gone through about three gallons of it. After the third gallon finished my hobby dealer told me to try the cool power with 15% nitro.

So i tried it yesterday. The engine ran fine on high throttle but as i came in on final at idle the engine died on me. This happened four times in a row. Four dead stick landings.
The engine has never died on me before. I was wondering should i go back to using castor oil fuel or do i need to do some adjusting on the mixture control.

Thanks Zain

RE: engine help
 

Zain:

Going from 10% to 15% will require a reset on the carb mixture.

Whether you run 10% or 15% you need to keep an amount of castor in the FP series engines. The plain bearing crank is not lubricated properly by the all synthetic oils. Doesn't need much, but add at least two ounces to a gallon of Cool Power, preferably four ounces.

Bill.

RE: engine help
 

Hi Bill thanks for the info

If i decide to add castor oil to my mix will i still need to adjust the mixture.
i have already set the mixture on the high end needle value do i need to adjust the low end screw also.

If i continue to use coolmax will i mess up the engine.
do you think i need to switch back to regular castor oil omega fuel the engine ran great on it.

thanks zain

RE: engine help
 

Zain:

Any change in the fuel mix will need at least a check of the mixture - maybe all you'll need is to peak it and then come right back to where it was to get your rich drop. If the idle and transition are good after checking the high speed there's no need to bother with the low speed mixture.

Since your engine ran file on the Omega 10% I see no reason why you should spend the higher buck for the higher nitro, or the extra money for the castor oil to add to the CP all synthetic mix.

The FP does not have ball bearings on the crankshaft, the synthetic oil just palin doesn't work all that well in a plain bearing engine. It will run on all synthetic, but it will wear out faster. With a castor blend the engine life is indefinite, if not mistreated it will last a very long time. Running it on all synthetic is mistreating ANY plain bearing engine.

Bill.

RE: engine help
 

Hi bill
i think i am going to go back to using the omega blend. i have a super tiger 91 ringed engine. Do you think i can use the cool power in that? This is a brand new engine.

thanks for all your help
zain

RE: engine help
 

Zain:

The CP will be fine in the ST 91. But the ST will also be happy with the Omega 10%, so why buy two different fuels? Use the rest of the CP in the ST, then just stay with the Omega.

Bill.

RE: engine help
 

Hi bill
that is exactly what i am planing to do.
Also What have you found that works best to clean the model with at the end of the day. Is regular windex strong enough or do you use something stronger.
zain

RE: engine help
 

Windex works. I've always found the cheapest spray cleaner at the supermarket works just as well.

Many have their own pet formula. Get an empty gallon jug and drop a couple caps of dish detergent in, a spoonful or two of ammonia, fill it with water. Or rubbing alcohol. Many choices.

Bill.

RE: engine help
 

Stick with a castor/synthetic mix for an ABC/ABN engine. Going from 10% to 15% will require needle valve adjustments.

Dr.1

RE: engine help
 

I agree with Will. You need some castor oil in the fuel for a plain bearing engine. The FP can last a really long time if you run some castor oil in the mix.

I also agree that most likely, the problem with deadsticking is caused by a change in nitro AND fuel viscosity (because of the lube change). Cool Power is a good fuel, but I wouldn't run it in a plain bearing engine unless the manufacturer said it was okay. Which, they won't do. In fact, I doubt if the maker of Cool Power (Morgan's) would recommend its use in your engine.

Ed Cregger

RE: engine help
 

I agree with Will. You need some castor oil in the fuel for a plain bearing engine. The FP can last a really long time if you run some castor oil in the mix.

I also agree that most likely, the problem with deadsticking is caused by a change in nitro AND fuel viscosity (because of the lube change). Cool Power is a good fuel, but I wouldn't run it in a plain bearing engine unless the manufacturer said it was okay. Which, they won't do. In fact, I doubt if the maker of Cool Power (Morgan's) would recommend its use in your engine.

Ed Cregger

RE: engine help
 

I agree with Will. You need some castor oil in the fuel for a plain bearing engine. The FP can last a really long time if you run some castor oil in the mix.

I also agree that most likely, the problem with deadsticking is caused by a change in nitro AND fuel viscosity (because of the lube change). Cool Power is a good fuel, but I wouldn't run it in a plain bearing engine unless the manufacturer said it was okay. Which, they won't do. In fact, I doubt if the maker of Cool Power (Morgan's) would recommend its use in your engine.

Ed Cregger