Hot urg

Conger1972 · 08-18-2011, 09:37 PM

G9 still over heating recently rebuilt new plug , air filter, checked cowl, checked brakes , set valves , new carb, loosened muffler and ran still hot, after 10 minutes sizzle water on valve cover, after 15 muffler will glow orange at motor, motor will get hot just running it in neutral, I am confused please help

DOOmsman · 08-18-2011, 11:18 PM

What color is the spark plug electrode?

Mud Slinga · 08-19-2011, 12:27 AM

sound like its running real lean

bigstik40 · 08-19-2011, 12:48 AM

I'm going to ask a question that may get some thought going among the members. Is there any chance that you missed lining up the timing marks on the camshaft when you reassembled the engine, causing the valve timing to be off ?? I suppose an early opening of the exhaust valve could result in combustion taking place in the exhaust area of the head and pipe to the muffler. I'm thinking this may be a possibility as everything you've checked so far hasn't resulted in a solution. Good luck - RAY

GMB74 · 08-19-2011, 05:06 AM

Glowing exhaust is a sign of running real lean or possibly ignition timing being off. Are you sure you have the correct carb for this model? Check for leaks at the intake manifold. If that doesn't reveal anything, then you need to look for an oddball problem in the ignition system. Timing is not adjustable, so things like the pickup coil damaged or installed improperly, flywheel magnets damaged or not timed correctly (sheared key?) or possibly a bad CDI box.
How does the engine start and run in general? This should give you a clue which direction to take.

I just read bigstik40's reply- that's a good one worth looking into.

Conger1972 · 08-19-2011, 07:45 AM

I guess it could be poss I did not line up timing marks, but cart runs really good until it gets hot, I thought timing off would make it run bad

Conger1972 · 08-19-2011, 07:50 AM

Plug looks pretty good just a elite grey to it

DOOmsman · 08-19-2011, 01:11 PM

Any grey is bad unless you are running VP114 octane race gas.
House mouse brown is what you want.

Conger1972 · 08-19-2011, 03:00 PM

Is there any way to adjust fuel mix

DOOmsman · 08-19-2011, 03:55 PM

I would start by checking the size of the jet in the new carb and the old carb.

08-18-2011, 09:37 PM	#1
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27	Hot urg G9 still over heating recently rebuilt new plug , air filter, checked cowl, checked brakes , set valves , new carb, loosened muffler and ran still hot, after 10 minutes sizzle water on valve cover, after 15 muffler will glow orange at motor, motor will get hot just running it in neutral, I am confused please help
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27

08-18-2011, 11:18 PM	#2
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Hot urg What color is the spark plug electrode?

08-19-2011, 12:27 AM	#3
Mud Slinga Not Yet Wild Join Date: Aug 2011 Location: new hampshire Posts: 9	Re: Hot urg sound like its running real lean

08-19-2011, 12:48 AM	#4
bigstik40 Gone Wild Join Date: Sep 2010 Location: Erie, Pennsylvania Posts: 989	Re: Hot urg I'm going to ask a question that may get some thought going among the members. Is there any chance that you missed lining up the timing marks on the camshaft when you reassembled the engine, causing the valve timing to be off ?? I suppose an early opening of the exhaust valve could result in combustion taking place in the exhaust area of the head and pipe to the muffler. I'm thinking this may be a possibility as everything you've checked so far hasn't resulted in a solution. Good luck - RAY

08-19-2011, 05:06 AM	#5
GMB74 Gone Wild Join Date: Jun 2009 Location: Heluvabump,VT Posts: 623	Re: Hot urg Glowing exhaust is a sign of running real lean or possibly ignition timing being off. Are you sure you have the correct carb for this model? Check for leaks at the intake manifold. If that doesn't reveal anything, then you need to look for an oddball problem in the ignition system. Timing is not adjustable, so things like the pickup coil damaged or installed improperly, flywheel magnets damaged or not timed correctly (sheared key?) or possibly a bad CDI box. How does the engine start and run in general? This should give you a clue which direction to take. I just read bigstik40's reply- that's a good one worth looking into.

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08-19-2011, 07:45 AM	#6
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27	Re: Hot urg I guess it could be poss I did not line up timing marks, but cart runs really good until it gets hot, I thought timing off would make it run bad
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27

08-19-2011, 07:50 AM	#7
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27	Re: Hot urg Plug looks pretty good just a elite grey to it
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27

08-19-2011, 01:11 PM	#8
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Hot urg Any grey is bad unless you are running VP114 octane race gas. House mouse brown is what you want.

08-19-2011, 03:00 PM	#9
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27	Re: Hot urg Is there any way to adjust fuel mix
Conger1972 Not Yet Wild Join Date: Aug 2011 Posts: 27

08-19-2011, 03:55 PM	#10
DOOmsman Gone Wild Join Date: Jul 2008 Location: Reddick IL Posts: 11,220	Re: Hot urg I would start by checking the size of the jet in the new carb and the old carb.