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Old 04-10-2006, 10:21 PM   #1
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Engine Troubles :(

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dont know if this is the right section, but here goes

Details are, Hyper Mach.28
just about 3 quarts of fuel ran thought it, no problems at all until now.

A little over a week ago I ran out of fuel, so I had to wait until I got a day off to make the drive to the hobby store ( 4 hours away, haha) to pick up some more, So I picked up a few quarts of the same stuff I was using.
the next day, I fill up my tank, warm up the engine a bit with a hair dryer ( I read that makes for easier start ups ?) and primed the fuel lines.

Attempted to start and it just simply wouldn't run, so I checked over some things, glow plug, plug ignitor, fuel, and so on, all seems fine, but for the purpose I put in a new glow plug.
and again, it still wouldn't run, so after 20 minutes of pulling it finally grabbed and started, but only ran for about 10 seconds and died off again.
when it did run, it sounded normal like it always did, but it just wouldn't stay going, so I pulled it over again it managed to get it going again.
this time is stayed at idle, however, after letting it idle for a few seconds, i started to blip the throttle, and nothing happened, the easiest way I can say it is it did not rev up.
the throttle was opening, I was watching it open, but the motor was doing nothing.
almost as if it was "bogging out".
so I killed the engine and started to look at things, everything looks ok, added yet another brand new out of the pack glow plug, checked all the fuel lines, check throttle operation along with the needle settings.
all seem fine, no leaks, no changes, working good.
so again, its a nice day, I attempt to go out and bash for a while, nothing, it literally took me 30 minutes just to get it to start and idle, and again, as soon as I attempt to open the throttle, she dies out.

I'm lost, still fairly new to this.

Any ideas on what I could check, adjust or cause this ?
buggy was working great up till now

one thing I did change, perhaps this is the answer to my problem, I don't know. When I picked up my fuel I also picked up new glow plugs, I changed from the Ofna plugs that came with it to the Mccoy MC8 as were reccomended to me by some people on here, would changing plugs give me troubles like this ? if so, how would I correct the problem ?

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Old 04-10-2006, 11:44 PM   #2
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The McCoy 8 is a long plug. You should be running a short plug on a .28 engine. If you have inded switched to a longer plug, you may be drowning it with fuel at the top of the compression stroke.
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Old 04-11-2006, 05:32 AM   #3
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Have you been running with the air filter installed or not?
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Old 04-11-2006, 09:03 AM   #4
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Re: Plugs

Originally Posted by cassat
You should be running a short plug on a .28 engine.
I run long plugs on all my aircraft .25's.

Check for dirt in the carb maybe? loose screws?
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Old 04-11-2006, 01:08 PM   #5
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try closing the high speed needle all the way in then unscrew twice...if it does start then make a few high speed passes to warm up the engine then bring it in engine still on n screw in the same needle about 1/2 a turn till u get the white smoke comin out the exhaust when the ur at full speed
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Old 04-11-2006, 08:40 PM   #6
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deffently sounds like a carb problem ... try closing it all up and setting it back to oem specs
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