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1988 big bear too far advanced on ignition timing is there any adjustment or the cdi? it runs but I have sheared two flywheel keyes and pulled both of my shoulders, and yes I use the decompressor.

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Posted on Jan 02, 2017

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SOURCE: Ignition stuck in run position with keys in it.

If it has a automatic transmission make sure it's in park (try pushing the shifter while twisting the key). Try wiggling the steering wheel while twisting the key. If the car is parked for long periods of time the ignition cylinder could be sticking (try spraying WD-40 in around the key). I had a classic car and the key fell out while the engine was running. And when I turned it off I couldn't turn it again even with the key, I had to replace the lock cylinder.

Posted on Feb 11, 2009

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SOURCE: Poulan saw will not start

This is not really a solution.... I can't post a comment. I think you know where I was going with the flywheel thing - whether or not the timing is right. I thought you'd pulled the flywheel yourself, and sorry, I'm not sure how to pull it. I'm assuming this is a 2 stroke motor... you might want to just check that the piston is near top dead center when the magnet on the flywheel hits the coil..... you can stick a pencil or anything long through the spark plug hole to give you an indication if the piston is at the top of the cylinder or not. Let me know how it goes!

Posted on Mar 14, 2009

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SOURCE: my tiller keeps shearing the key in my flywheel to

there seems to be a problem with the mechanism, there is a defect with it or a malfunction you will need to show it to a mechanic.

Posted on Apr 04, 2009

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SOURCE: craftsman air compressor bearing flywheel

Your local hardware store should have one. The model number will probably not help; you will need to measure the keyway width and height to buy key stock of those dimensions then cut off the length you need.
Hope this helps.

Posted on May 22, 2009

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SOURCE: I have a briggs and stratton 15.5 ohv, model#

Found that I had left the comprssion washer (flywheel washer) off when I assembled it the first time. Put it on and torqued to spec it runs fine now.

Posted on Jun 07, 2009

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Pull Cord Stops...

could be valve needs set. if it isn't opening at the right time it wont release compression for it to start. it may be the shear key in the flywheel has sheared if you have hit something like a big rock or log or something causing it to die suddenly.

May 17, 2016 | Craftsman Garden

1 Answer

Why is it difficult to start and wants to kick?

I don't know what saw you're playing with, but the problem is quite probably that the ignition is too far advanced. Possible causes could be:
- partially sheared flywheel key. This would change the position of the flywheel magnets in relation to the coil, or
- Mis-aligned coil. The coil is secured by a couple of screws in slots. Slacking the screws allows the coil to be moved, this changing the Timing.
If you remove the flywheel and the key is intact, then carefully mark the position of the coil, then slack the screws and move the coil 1 or 2 marks (there should be a series of timing marks) in the direction of flywheel rotation. Tighten the screws, re-install the flywheel, and give it a try.

Jan 24, 2016 | Garden

1 Answer

Early 1952 J.D. G model- runs very rough, vibrates. runs good on pull, vibrates. Tried good different carb and dist. This tractor apparently was built of many other tractors. The flywheel was out of t

check the timing setting as it may be too far advanced ( set at 5 degrees advanced to start) check and adjust the fuel setting of the main jet as it may be too rich at idle.. You state that the flywheel was out of true and with the vibrations I suspect that the crank shaft may be bent. Something that would not normally be checked

Dec 21, 2014 | Cars & Trucks

1 Answer

Still chainsaw ms260z will not start

If fuel is making its way to the cylinder and the plug is wet then check the following
1) For clogged spark arrestor if fitted with one.
2) Compression - Needs to be at least 100 psi to ignite the fuel mix
3) Flywheel shear key - A sheared key will have the ignition timing too far off to start.

Nov 15, 2014 | Garden

1 Answer

I have a 9hp i/c ohv single cylinder model 21a902 type 0142e1 motor on my log splitter. When I try to start it after three or four pulls it backfires and pulls the pull odd right out of my hand. When I et...

The rope snatching is an indication of a sheared flywheel key. It is over advanced (ignition timing). Pull fly wheel and use a steel replacement key. Original key was probably aluminum. The valves a adjusted cold with the valve closed, set with a slight shake present at rocker arm and valve stem.

May 26, 2017 | Cars & Trucks

1 Answer

I have a9hp briggs verticals shaft engine on a log splitter. When I try to start the engine after a couple of pulls it will backfire and pull the pull cord right out of my hand. I've been told that I have...

Far more likely is that the woodriff key , on the flywheel, is slightly stripped or sheared, due to sudden stoppage of engine. Remove shroud and flywheel (may need puller or help to do so) Check flywheel key(woodriff) to see if it is ok or partly sheared.

As far a valves, I doubt that they are adjustable. Look up gap for that engine and check, at maximum opening (Turn by hand )with feeler gauge (metal thickness gauge) open adjustment on valve. You will see how when checking the gap. Personally I still don't believe that they are adjustable.

Jul 21, 2014 | Measuring Tools & Sensors

1 Answer

Set timing on tecumseh 5-H.P. gasoline engine model H50-65371 J

Indications that the motor is out of time: jerks the rope out of your hand when trying to start, pops out the carb, runs but has no power and sounds 'off'.
When assembling the motor a dot on the cam gear and a dot on the crank gear need to be lined up.
If the motor has run correctly before the problem and has not been disassembled then the problem is likely external.
There are no actual timing adjustments. The flywheel key holds the flywheel in the correct position. If it is sheared or partially sheared the timing will be off. Check the flywheel key by removing the flywheel and visually inspecting the flywheel key; replace if not 100%. On assembly be sure the flywheel nut is tight or it will shear the key (again), then set the armature air gap ( gap between ignition module and flywheel magnet) to .020
On older motors the points gap can affect timing also but I dont believe your model has points. The points gap is also .020

Nov 19, 2012 | Tecumseh 5hp Engine Snow King Mtd Blowers...

1 Answer

Blade struck a stone outcrop and ever since, the engine bogs down when it hits a thick stand of grass. Will the timing advance or ****** if the blade whacks something like a large rock? IF so, how can...

Yes....the timing has been messed up and you have most likely sheared the flywheel key. It is in a keyway machined into the flywheel end of the crankshaft. Rather than the motor letting go when something like this happens (inertia would destroy it from going fast to dead stop)...this key shears off and timing goes with it...You will need to pull the flywheel (under recoil starter) and get a new key (about a dollar) to fix this.

Aug 17, 2010 | Garden

2 Answers

Was mowing and hit a rock now the mower won't start, Blade is turning when I crank it but it doesn't even attempt to start

The flywheel key has sheared or partially sheared which throws off the spark timing. Removing the flywheel and replacing this key will put the timing back in place. If the crankshaft bent at all you will feel a new vibration when it starts. As long as it is not to severe and the blade is not hitting any metal it is ok to run.

Nov 30, 2009 | Poulan Pro 22" Self Propelled High Wheel...

1 Answer

I have a cub cadet push mower with a 173cc ohv engine. i was cutting grass the other day and fire came out of the muffler and now it acts like its not firing maybe like it jumed time but not sure. thanks...

most likely a sheared flywheel key, pull the cover off the flywheel and remove the nut that holds the flywheel on. The key slot in the flywheel should line up with the key in the crankshaft if not pull the flywheel and install a new key, or take it to a small engine repair and they will do it for you. If the key is good, reassemble the flywheel nut etc and check for spark at the spark plug and see if the spark plug is wet with gas if you have spark and gas and the flywheel key not sheared and it still won't run, you may have an internal problem

Oct 02, 2009 | Garden

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