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Engine Overkill

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Old 06-09-2004 | 09:51 PM
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Default Engine Overkill

I'm running a .50 raptor

I think i've overheated my engine 1 too many times. Now it wont start. A freind at the hobby shop thinks the engine has no more compression. If that is true, should i change the piston and piston ring? Maybe even change the piston liner? Would those 3 items give me back the compression I need? Am I even in the right ball park?

Or is it unrecoverable? Should I just go out and buy another 50 sized engine?

Thanks.
Old 06-09-2004 | 11:22 PM
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Default RE: Engine Overkill

youve changed the glow plug? The carb lines are not dirty are they? Im sure you checked the obvious..
Old 06-10-2004 | 02:27 AM
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Default RE: Engine Overkill

be sure to check the head bolts too.

usually it cost nearly as much for those parts as it does for a new motor.
Old 06-10-2004 | 02:44 PM
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Default RE: Engine Overkill

yup, i checked the glow plug, fuel line is ok. It doesnt sound like there's any fire in the chamber. Not even close. And i'm sure its not flooded.

Also, yes, the cost of getting a piston, piston ring and cyclinder head is about $50.00. I can get the entire 50H for $89.
Old 06-10-2004 | 02:46 PM
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Default RE: Engine Overkill

buy a new one for that price
Old 06-10-2004 | 09:27 PM
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Default RE: Engine Overkill

If you can get OS 50sxh engines for $89, buy all you can and I'll give you $100 each. Last one I bought was $159. I can't get the old 46fxH for $89!
Unless the cylinder or piston is scored or burnt through, all you should need is a new ring. If the eingine has no compression, it's likely the piston has a hole in it. A new piston and ring should be less than $50.
Matt
Old 06-10-2004 | 11:42 PM
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Default RE: Engine Overkill

No, the cheapest i've seen the OS 50shx is $164.99, the 50H is selling for $89. My apologies for the typo. My local hobby shop advised me to stay away from the TT engines. I will replace the ring and piston first and see what happens before i spend 164.99 on a new engine.

The tech at my hobby shop says, "if i flood the engine with fuel, it will start for about 1 second, then die." So I know for sure the glow plug is ok. He even disconnected the fuel filter to make sure nothing was clogging the path. He doesnt think there's enough pressure to feed the engine with fuel.

1 area of concern is, the hose that goes from the gas tank to the muffler is not a snug fit. If i gently grab it and take it off, it will come off. Do you think I should glue it or strap it on tighter? I have a feeling the pressure is leaking out of that connection. Hence, the lack of fuel pressure to the carb.
Old 06-13-2004 | 06:57 AM
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Default RE: Engine Overkill

It is normal for the fuel line to pull off easily. That is how you add fuel. If it sort of falls off, it could be either too big or worn out. Try a new piece of the correct diameter. You should be using the medium diameter.

Tom

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