lt1045 cub cade would not startr

[eskandari_n1]

In that case I would pull the flywheel off and check for a sheared key. I've been working on a Briggs engine that shears the flywheel key and technical assistance says there is a new flywheel key to prevent this problem. I can't say for sure that is your problem but you are the eyes and hands and will have to dig a little deeper. Like I said in my previous post, if you have spark at the right time, good compression, and proper air/fuel ratio, theoretically the engine should start and run.

Since you have spark and compression (at least some compression) and added supplemental fuel (starting fluid) and the engine did not start, it is leading me to believe that the spark is off time. Did the engine happen to backfire through the intake or exhaust by any chance?

thank, Lawnranger. one question.if flywheel key is sheared. there should be no compression. is it correct statment?

 

[Lawnranger]

thank, Lawnranger. one question.if flywheel key is sheared. there should be no compression. is it correct statment?

No. The flywheel has a magnet mounted in it and as the flywheel spins the magnet passes the ignition coil which creates an electric field that induces the spark. If the flywheel position moves in relation to the crankshaft (sheared key), the ignition timing will be off but the valve timing is still on so you will still have compression even though the flywheel may have moved on the crankshaft.

Remove the blower housing and related parts so you can look straight down the center of the crankshaft with the flywheel still attached and see if the crankshaft key way is or isn't lined up with the flywheel key way.

 

[Lawnranger]

In that case I would pull the flywheel off and check for a sheared key. I've been working on a Briggs engine that shears the flywheel key and technical assistance says there is a new flywheel key to prevent this problem. I can't say for sure that is your problem but you are the eyes and hands and will have to dig a little deeper. Like I said in my previous post, if you have spark at the right time, good compression, and proper air/fuel ratio, theoretically the engine should start and run.

Since you have spark and compression (at least some compression) and added supplemental fuel (starting fluid) and the engine did not start, it is leading me to believe that the spark is off time. Did the engine happen to backfire through the intake or exhaust by any chance?

By the way, you never answered my question

 

[eskandari_n1]

By the way, you never answered my question

I am sorry what the question What was the questuion?

I will check tonite when I go home.

Also do I need set piston on any postion before I key the flywheel.

 

[eskandari_n1]

In that case I would pull the flywheel off and check for a sheared key. I've been working on a Briggs engine that shears the flywheel key and technical assistance says there is a new flywheel key to prevent this problem. I can't say for sure that is your problem but you are the eyes and hands and will have to dig a little deeper. Like I said in my previous post, if you have spark at the right time, good compression, and proper air/fuel ratio, theoretically the engine should start and run.

Since you have spark and compression (at least some compression) and added supplemental fuel (starting fluid) and the engine did not start, it is leading me to believe that the spark is off time. Did the engine happen to backfire through the intake or exhaust by any chance?

Did the engine happen to backfire through the intake or exhaust by any chance? no

 

[Lawnranger]

Also do I need set piston on any postion before I key the flywheel.

Just remove the blower housing and starter clutch (if applicable) or nut that holds the flywheel on and look straight down on the crankshaft. You will find a key way on the crank and on the flywheel. Both key ways should line up and if they don't you have to replace the key.

 

[eskandari_n1]

Just remove the blower housing and starter clutch (if applicable) or nut that holds the flywheel on and look straight down on the crankshaft. You will find a key way on the crank and on the flywheel. Both key ways should line up and if they don't you have to replace the key.

Lawnrenger, key was okay I took flywheel out clean dust an magnito , install it back. no luck. the only thing I forgot to do check mannito under flywheel for countinuty.

 

[Lawnranger]

Lawnrenger, key was okay I took flywheel out clean dust an magnito , install it back. no luck. the only thing I forgot to do check mannito under flywheel for countinuty.

Well now, you have an engine that gets fuel, has spark, has some compression (but we don't know how much) and still won't start. Something is missing. Something is missing. Something is missing. Put on your detective hat and start looking for what is missing. You are the eyes and hands of the situation and all I can go on is what you tell me. I have given you the probable causes of why your engine won't start but still something is missing - what can it be?

The engine needs the correct air/fuel ratio, spark at the right time and compression to start so what is missing from your picture - you are the eyes and hands and will have to tell me what is missing. Maybe it's time you go out and purchase a real compression gauge. Your engine has spark, and now you verified it is in time, plus you sprayed starting fluid in the carburetor and it still won't start. That leaves one part of the equation unanswered. Can you tell me what part is missing???

 

[eskandari_n1]

Well now, you have an engine that gets fuel, has spark, has some compression (but we don't know how much) and still won't start. Something is missing. Something is missing. Something is missing. Put on your detective hat and start looking for what is missing. You are the eyes and hands of the situation and all I can go on is what you tell me. I have given you the probable causes of why your engine won't start but still something is missing - what can it be?

The engine needs the correct air/fuel ratio, spark at the right time and compression to start so what is missing from your picture - you are the eyes and hands and will have to tell me what is missing. Maybe it's time you go out and purchase a real compression gauge. Your engine has spark, and now you verified it is in time, plus you sprayed starting fluid in the carburetor and it still won't start. That leaves one part of the equation unanswered. Can you tell me what part is missing???

Lawnranger, what compration should be 20hp engine. I am getting compration gauge? how does gas souck in to engin from carbrator

 

[Lawnranger]

Lawnranger, what compration should be 20hp engine. I am getting compration gauge? how does gas souck in to engin from carbrator

This should help all of us:

Since this is a help forum, it is only fair that the people trying to answer questions have some information to work with, so they can give an accurate answer. This helps them if they need to research parts or service information on your engine or equipment. In the first part of your post please include your engine numbers from the ID tag or stamping and the equipment type and model numbers that are on it. Failure to do this may result in you not receiving any accurate help with your problem.

When this forum first started it was much smaller and it was common practice to post some information about the unit along with the question, but we've had a lot of new people join lately who seem to overlook this important step about posting.

Many of the tech's that hang out here work in or have their own shops and the first thing they do when they make up a work order on a unit is include the engine and equipment numbers on the work order. Since this technical forum is offered free to the public, it's the least we can ask you to do, so please help all of us out. So please post the numbers, it should be the first thing you write before beginning your question.




"Lawnranger, what compration should be 20hp engine. I am getting compration gauge? how does gas souck in to engin from carbrator"

compration should be 20hp engine good compration at least hunred lb. "I am getting compration gaug?" sound like you dont know if you gonna git compration gage wit quetion mrk gas git souck in by jat in carbrator