Engine wont start? TROUBLESHOOTING GUIDE

Luvyopssy

New Member
Joined
Nov 17, 2016
Messages
24
Won't Start

I am having the same problem. Got spark, got gas but no go. I'm going to check the magnet next to see if it might be installed backwards. I don't know what else might be wrong. These things can drive you crazy.

The Crawler
does it make a sound when you let the clutch out
 


inspectorcritic

Well-Known Member
Joined
Dec 13, 2015
Messages
1,374
Check your carb connection to see if you have a massive air leak. Next pull your jug off inspect for cracks or for dimples.

Next solution get about hundred bucks buy another motor had to replace 2 with same phantom problems of won't start when tried every thing.
 

09mantlek

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Joined
Feb 3, 2020
Messages
12
After assembling my monstrosity I put the choke on, primed the carb and took it down a hill let the clutch out and it fired up, proper running noise and as i slowed down the hill the engine slowed down and the engine will NOT run by itself once started. As soon as I pull clutch in it dies. I’m thinking fuel starvation as it’s a new engine so I’m going to get some fresh fuel with a bit of two stroke oil today and lob a bit in the spark plug hole mix it around by turning crank over and try again. I will also inspect needle but it looked fine when I assembled it. Anyone had similar issue??
 

09mantlek

New Member
Joined
Feb 3, 2020
Messages
12
Probably running so rich that the choke is not needed.
I’m thinking more ignition timing as it’s still not working 😓 really upsetting me not going to lie.
it literally doesn’t run unless I’m forcing the crank around by pedalling. Thinking if timing is majorly out then it won’t even have power to run itself with out a load.

Any idea on how to check the magneto against the piston position?
 

Chainlube

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Joined
Jan 5, 2020
Messages
1,339
Pull the plug and attach it to the spark plug lead, lay the plug against the block of the engine and spin the back wheel with the clutch engaged. This will tell you if you have a spark or not. If it doesn't have a spark then you'll need a new coil pack. The front cover on the left side covers the mag. we are talking about a common 2 stoke, right?
 

09mantlek

New Member
Joined
Feb 3, 2020
Messages
12
Pull the plug and attach it to the spark plug lead, lay the plug against the block of the engine and spin the back wheel with the clutch engaged. This will tell you if you have a spark or not. If it doesn't have a spark then you'll need a new coil pack. The front cover on the left side covers the mag. we are talking about a common 2 stoke, right?
Yes mate, I 100% have a consistent spark as I ran the test multiple times, I have a video of me engaging engine you hear it run (slowly) but if you disengage the rear wheel from the engine by pulling the clutch in it instantly dies. As if something isn’t right for it to run itself. I’ve chucked about a tablespoon of fuel in the spark plug hole today and turned the engine over by hand a few times to make sure it’s not fuel related obviously it’s not the air so must be spark :/ but I have a spark 😭
 

09mantlek

New Member
Joined
Feb 3, 2020
Messages
12
Yes mate, I 100% have a consistent spark as I ran the test multiple times, I have a video of me engaging engine you hear it run (slowly) but if you disengage the rear wheel from the engine by pulling the clutch in it instantly dies. As if something isn’t right for it to run itself. I’ve chucked about a tablespoon of fuel in the spark plug hole today and turned the engine over by hand a few times to make sure it’s not fuel related obviously it’s not the air so must be spark :/ but I have a spark 😭
Oh by the way, this is a brand new engine my first one.
 

Street Ryderz

Well-Known Member
Joined
Oct 14, 2016
Messages
3,553
I’m thinking more ignition timing as it’s still not working 😓 really upsetting me not going to lie.
it literally doesn’t run unless I’m forcing the crank around by pedalling. Thinking if timing is majorly out then it won’t even have power to run itself with out a load.

Any idea on how to check the magneto against the piston position?
It's not the timing,the timing is fixed on these and all ready to far advanced.during break in the engine is tight and should only be run short heat cycles under load until it free's up.Re check head torque small leak there losses alot of power,set needle on the second notch from the top.you still could have a bad cdi or mag even when it still shows spark,use spark strength tester to verify.
 
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