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motor runs like crap

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Old 05-28-2012, 02:01 PM
  #1
handyman
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Default motor runs like crap

motor runs great with plane level........bring nose up..motor craps out,,,,,,,,,tank is center of carb,,,,,,,,,,no air bulbs,,,,,,,,,,new fuel,,,,,,,,,,,new glow plug..........3 prayers to the motor god..............what now
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Old 05-28-2012, 02:12 PM
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jetmech05
 
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Default RE: motor runs like crap

Are you sure your clunk is in the back of your tank? sometimes it can get stuck up front. other than that it sounds like a tunning issue
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Old 05-28-2012, 02:15 PM
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handyman
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Default RE: motor runs like crap

yeas the clunk is in the back and it will fall if held upside down,,,,,,,,,as for tunning where or what?..........as i said runs great level
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Old 05-28-2012, 02:37 PM
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Default RE: motor runs like crap

How far back is the tank? Are you using muffler pressure? Is this a Pitts muffler? Small, medium or large fuel tubing? If you drop the nose, does it go rich?

Buzz.
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Old 05-28-2012, 03:35 PM
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Default RE: motor runs like crap

Sounds like it is too lean.

Have you tried to richen it up a bit and see what happens?
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Old 05-28-2012, 04:59 PM
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Default RE: motor runs like crap

What size fuel tubing and are you using muffler pressure? Should be using medium size tubing and pretty direct connections. If you are using a three line set, be sure to plug the overflow/vent line or muffler pressure will do no good.

Just my 2 cents worth..
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Old 05-28-2012, 06:45 PM
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jester_s1
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Default RE: motor runs like crap

Define what "runs great" means. Does that mean you are at peak RPM at a level attitude? If so, you are too lean to allow for the drop in fuel pressure in a vertical line or the unloading that happens in flight. That's of course assuming that you don't have a tank issue as others have mentioned.
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Old 05-28-2012, 06:52 PM
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Default RE: motor runs like crap

turn 1/4 left to richen
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Old 05-28-2012, 07:56 PM
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Default RE: motor runs like crap

Do you suppose it might help if you posted exactly what kind of engine you have?
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