Stuck half dead center -- whut?

[Cupooterluvr]

I have this project that I'm going to enter into a science fair at school that involves dieselizing some nitro engines and then comparing it to other fuels.

Today I was breaking in the engines and about halfway through the second tank on one of them it just stops suddenly with a loud click. The prop would only move about 180* so I took the head off and tried it again. It turns out the piston apparently got caught on one of the ports and gouged out a chunk. The conrod is perfectly fine.

Anyone ever had this happen before?

 

[Crunkvilletx]

I havnt but that sucks

 

[BradZ]

Well that sucks..
Sorry to hear.

 

[Rolex]

New engine? Factory porting or after market?

 

[Cupooterluvr]

New engine? Factory porting or after market?

New OS .10la. It's pretty cheap (didn't want to spend a lot on school :ahem and only has bushings instead of bearings. The sleeve isn't made of brass; it looks more like steel or aluminum.

 

[brad55102]

you should call O.S.
They'll stand behind their product.

 

[Suicide]

I'm not going to say O.S. doesn't stand behind there stuff but you ran diesel through it or have you not run diesel through it and just run airplane gas so far. If you ran airplane gas your fine but if you ran diesel through it that motor is trash OS won't stand behind it

 

[BradZ]

If you've run the incorrect fuel through it i doubt O.S will stand behind it..

 

[brad55102]

lol i missed the part when you said you ran diesel in it. lol

 

[BradZ]

Do you think it was the deisel that caused it?
Or just bad luck?

 

[Cupooterluvr]

Do you think it was the deisel that caused it?
Or just bad luck?

Just bad luck. The conversions are made to run on certain engines and I have the right model of conversion head. It's not straight diesel fuel; it's more like kerosene with ether and various other components added.