Noob here with engine trouble 89 cc

OUTOFDOORS · 10-01-2009, 12:42 PM

I was recently given an 89 cc it drove when i got it but the clutch on the engine was making a horrible noise so i brought it to my shop and took the clutch apart and cleaned it and put it back together, then took carb off and cleaned it up. took top off of motor cleaned up carbon and then reassembled, now it wont start. the motor pops and back fires, but wont run. Any ideas? also what kind of compression should i be looking at? oh and it will back fire out of the carb sometimes too, If it was a car motor i would be looking to retime it. but i am lost with carts.

OUTOFDOORS · 10-01-2009, 05:43 PM

I have now gone through and figured out the flywheel keeps sheering the key way off of the crank and thus going out of time. has anyone had any type of issue with this?

scottyb · 10-01-2009, 05:54 PM

No ....... is it a flathead? Yes?

OUTOFDOORS · 10-01-2009, 06:15 PM

Yes it is a flat head

scottyb · 10-01-2009, 06:43 PM

I have not heard of that problem before, maybe somebody else has?

crash12888 · 10-01-2009, 09:19 PM

Never heard of a repete shear problem.
Check for burrs on the taper of the crank and in the flywheel, Using the correct key or making them?
Proper torque on the flywheel nut?
Try a light coat of thread lock on the taper area before assy with proper key and torque.

scottyb · 10-01-2009, 09:21 PM

Quote:

Originally Posted by crash12888

Never heard of a repete shear problem.
Check for burrs on the taper of the crank and in the flywheel, Using the correct key or making them?
Proper torque on the flywheel nut?
Try a light coat of thread lock on the taper area before assy with proper key and torque.

What is the proper torque on the flywheel nut for a flathead motor?

crash12888 · 10-01-2009, 09:38 PM

I aint gotta a clue!!!!

OUTOFDOORS · 10-01-2009, 09:43 PM

Well after closer inspection i have found the notch in both the flywheel and the crank are not the correct shape anymore, so i will probably try some tricks before i decide if a rebuild or new engine is the best option. oh and where would you recommend getting a rebuild kit from?

crash12888 · 10-01-2009, 09:58 PM

I don't like to pick one over the other but all of our site sponsors are TOP NOTCH!
(or they wouldn't last long with this bunch!) Give'em a call and get pricing.

10-01-2009, 12:42 PM	#1
OUTOFDOORS Not Yet Wild Join Date: Oct 2009 Location: Chandler, AZ Posts: 6	Noob here with engine trouble 89 cc I was recently given an 89 cc it drove when i got it but the clutch on the engine was making a horrible noise so i brought it to my shop and took the clutch apart and cleaned it and put it back together, then took carb off and cleaned it up. took top off of motor cleaned up carbon and then reassembled, now it wont start. the motor pops and back fires, but wont run. Any ideas? also what kind of compression should i be looking at? oh and it will back fire out of the carb sometimes too, If it was a car motor i would be looking to retime it. but i am lost with carts.

10-01-2009, 05:43 PM	#2
OUTOFDOORS Not Yet Wild Join Date: Oct 2009 Location: Chandler, AZ Posts: 6	Re: Noob here with engine trouble 89 cc I have now gone through and figured out the flywheel keeps sheering the key way off of the crank and thus going out of time. has anyone had any type of issue with this?

10-01-2009, 05:54 PM	#3
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,419	Re: Noob here with engine trouble 89 cc No ....... is it a flathead? Yes?

10-01-2009, 06:15 PM	#4
OUTOFDOORS Not Yet Wild Join Date: Oct 2009 Location: Chandler, AZ Posts: 6	Re: Noob here with engine trouble 89 cc Yes it is a flat head

10-01-2009, 06:43 PM	#5
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,419	Re: Noob here with engine trouble 89 cc I have not heard of that problem before, maybe somebody else has?

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10-01-2009, 09:19 PM	#6
crash12888 Gone Crazy Join Date: Jan 2007 Location: Chesterfield, Va Posts: 6,021	Re: Noob here with engine trouble 89 cc Never heard of a repete shear problem. Check for burrs on the taper of the crank and in the flywheel, Using the correct key or making them? Proper torque on the flywheel nut? Try a light coat of thread lock on the taper area before assy with proper key and torque.

10-01-2009, 09:38 PM	#8
crash12888 Gone Crazy Join Date: Jan 2007 Location: Chesterfield, Va Posts: 6,021	Re: Noob here with engine trouble 89 cc I aint gotta a clue!!!!

10-01-2009, 09:43 PM	#9
OUTOFDOORS Not Yet Wild Join Date: Oct 2009 Location: Chandler, AZ Posts: 6	Re: Noob here with engine trouble 89 cc Well after closer inspection i have found the notch in both the flywheel and the crank are not the correct shape anymore, so i will probably try some tricks before i decide if a rebuild or new engine is the best option. oh and where would you recommend getting a rebuild kit from?

10-01-2009, 09:58 PM	#10
crash12888 Gone Crazy Join Date: Jan 2007 Location: Chesterfield, Va Posts: 6,021	Re: Noob here with engine trouble 89 cc I don't like to pick one over the other but all of our site sponsors are TOP NOTCH! (or they wouldn't last long with this bunch!) Give'em a call and get pricing.

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