GR Pro 50cc engine

[wildflyer]

Hi guys. Need help. I have a GR Pro engine, 50cc single cylinder gas engine. I find it hard to start. I used the mahufacturers setting in the Low (2.5 turns) and High (1 turn) setting for the needles and still hard to start. When the engine finally started, (after 6 full turns of the Low end needle) there is a BIG vibration of the engine. I am using 1:30 ratio of fuel/oil, prop and spinner is balanced. Any of you guys out there tried this engine? Does it really give off a lot of vibration during the break-in period?

[stommerd27]

Single cylinders do shake more than the twins but yours sounds like it set way to rich. Is your choke working when you are first trying to start it? Because it sounds to me like you compensated for the choke not closing by turning the needle out so far that it didn't need the choke.

After you start the engine and it warms up have you tried adjusting the needles and getting it to run perfect?

[rcign]

There is nothing in an engine that changes after breaking in....The piston rings gradually wear to fit the bore, the crank seals get a little looser, NOTHING else...If it shakes when new with the carb PROPERLY adjusted it will shake just as much after 100 gallons of fuel has been run through it, if it still runs
There is no carb on the planet that needs 6 turns out on the low needle to run...Anything over 3 turns open will only cause the needle to fall out in flight...
If a carb needs more than 2 turns open to run there is another problem somewhere...
Factory settings are a myth, no one can predict what the operating conditions will be...If you start with 2 turns open on both and the engine will not start, the problem is either a bad carb or a leak somewhere...
It's too bad ALL manufactureres and/or dealers don't run ALL engines before shipping, many problems could be fixed at the beginning.
Too many dealers just want to turn a quick profit, buy some cheap Chinese engines and get them out as quickly as possible...
I AM NOT BEING RACIST BY REFERRING TO ENGINES MADE IN CHINA AS CHINESE ENGINES.. If SOMEONE (YOU KNOW WHO YOU ARE) COULD TELL ME WHAT ELSE TO CALL CHINESE ENGINES I WILL "MAYBE" DO IT....
And SOMEONE is also getting some flak on the OTHER engine site for questionable advertising....Nuff said

[wildflyer]

Hi stommerd: Problem is i cannot adjust the needle due to the vibration of the engine. I can't even hold my receiver which is mounted on the power box because it hurts when I try to hold it due to the vibration. Well only thing I can do now is to open the low end needle to the manufacturers specs and see what happens.

rcign: I agree with you sir, more on the profit but less on the quality. Guess this is the price I have to pay for buying such a cheap engine.

Thanks guys.

	Quote: Originally Posted by stommerd27
	Single cylinders do shake more than the twins but yours sounds like it set way to rich. Is your choke working when you are first trying to start it? Because it sounds to me like you compensated for the choke not closing by turning the needle out so far that it didn't need the choke. After you start the engine and it warms up have you tried adjusting the needles and getting it to run perfect?

[Al Lewis]

Who did you buy this thing from??

Hey Ralph, maybe we should called them "Quality Challenged" engines. That wouldn't be fair to the one ot two guys making good ones though.

[wildflyer]

I got this from the dealer of GR Pro engines, Alfonso Wang. He e-mailed me on this and what a waste of money. Well can't really say right now since the engine in still in the break-in period. I hope some guys there who bought this kind of engine can give me some pointers on what they have done with their engines.

	Quote: Originally Posted by Al Lewis
	Who did you buy this thing from?? Hey Ralph, maybe we should called them "Quality Challenged" engines. That wouldn't be fair to the one ot two guys making good ones though.