50cc Gas Engine Rebuild
Need advice rebuilding a Tanaka 50cc gas engine. Bought a new piston/rings but cylinders are no longer available. Should I hone the cylinder or leave it alone? I've heard if the cylinder is chrome plated or Nakasil plated it could do more harm than good.
Thanks Jeff |
RE: 50cc Gas Engine Rebuild
You heard right as trying to hone the cylinder would most likely make it worst than it already is. All you need to do is to use some 400 grade emery with some oil and by lightly hand rubbing in a circular motion remove the glazing from the cylinder which helps the new rings to bed in. Wash and dry properly and then oil lightly before fitting the new piston and rings.
Karol |
RE: 50cc Gas Engine Rebuild
Watch out DLE,JC EVO is coming
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RE: 50cc Gas Engine Rebuild
ORIGINAL: karolh You heard right as trying to hone the cylinder would most likely make it worst than it already is. All you need to do is to use some 400 grade emery with some oil and by lightly hand rubbing in a circular motion remove the glazing from the cylinder which helps the new rings to bed in. Wash and dry properly and then oil lightly before fitting the new piston and rings. Karol |
RE: 50cc Gas Engine Rebuild
Good point Capt,n as the few that I have done I used an old toothbrush to scrub clean the cylinder bore.
Karol |
RE: 50cc Gas Engine Rebuild
captin, would a brass wire brush be more appropiate than a steel one? Dan.
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RE: 50cc Gas Engine Rebuild
Don't think it really matter what you use as long as you get the cylinder walls clean of all possible residue before reassembly.
Karol |
RE: 50cc Gas Engine Rebuild
ORIGINAL: All Day Dan captin, would a brass wire brush be more appropiate than a steel one? Dan. |
RE: 50cc Gas Engine Rebuild
CAN SOMEONE PLEASE TELL ME,WHEN ENGINE IS HOT IDLE GOES UP,IS THAT RICH ON LOW OR HI NEEDLE
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RE: 50cc Gas Engine Rebuild
Having a rich mixture on the Low mix or Hi mixture does not make a engine run hot. Too lean a mixture will make engine hot...also not enough airflow over cooling fins and the wrong spark timimg will make a engine run hot. Time to start reading a lot more about this and talk with a person at a flying field who knows about engines. Goood Luck.....Capt,n PS Make sure you have the right oil in the gas at correct ratio.
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RE: 50cc Gas Engine Rebuild
SOLO48 the engine is a little to lean on the low end.
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RE: 50cc Gas Engine Rebuild
ORIGINAL: SOLO_48 CAN SOMEONE PLEASE TELL ME,WHEN ENGINE IS HOT IDLE GOES UP,IS THAT RICH ON LOW OR HI NEEDLE |
RE: 50cc Gas Engine Rebuild
thanks for the info.will try next time at field
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RE: 50cc Gas Engine Rebuild
Yes engine is at normal idle .After 5 min flite when i go to land idle is very hi
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RE: 50cc Gas Engine Rebuild
After you land your airplaneand the Idle is high....thats the time to adjust your trim Idle speed on TX also. A lot of RC people have a radio(TX) that has at least 2 different Idle speeds and you can use the lowest one on landing. It sounds like you need to experiment a little on getting things right with the Idle. Do not worry ifthe engine soundsrich on idle if the engine is cold. If your engine is not broke- in...that should all get better too when it gets broke-in. Capt,n
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