lt1045 cub cade would not startr

[eskandari_n1]

lt1045 cub cade would not startr. crank oaky . see spark. replace spark plug , ingintion modudel no luck any help will be greate

 

[Lawnranger]

Probably know this engine need sparkat rite tyme compprsion rite aire rite fule what is misin?

 

[eskandari_n1]

Probably know this engine need sparkat rite tyme compprsion rite aire rite fule what is misin?

what are you trying to say? I did not get it.

 

[Lawnranger]

u probably know this. engine need spark at rite tyme. compprsion. rite amnt aire. rite amnt fuel. what is missin from equazion?

 

[eskandari_n1]

u probably know this. engine need spark at rite tyme. compprsion. rite amnt aire. rite amnt fuel. what is missin from equazion?

so what you saying there may be timing issue. if this is case how do you check timing on small engine.

 

[Lawnranger]

im sayin one part of equazion is missin from pictur. u tel me wat u dn't hav. spark at rite tyme? fule? aire? compprsion? wich 1 is missin? make cheks an tel me wat is missin.

 

[eskandari_n1]

im sayin one part of equazion is missin from pictur. u tel me wat u dn't hav. spark at rite tyme? fule? aire? compprsion? wich 1 is missin? make cheks an tel me wat is missin.

So far I have done the following:

* Verified spark by pulling plug from cylinder, grounding plug to engine, and cranking. Appears to have good spark?? I also replaced the plug.

* Tested the fuel shut-off valve on the carburetor. It appears to be working.

* Verified that the float bowl is full of fuel.

* Replaced Ig module

* check compprsion.

 

[Lawnranger]

Ok, good. That helps a lot. It sounds like the engine cranks just fine but will not start. Try a shot of carburetor cleaner (remove air filter first) in the carburetor and crank the engine. If the engine starts and runs for a few seconds, then dies, you most likely have a fuel problem in the carburetor i.e. main jet plugged. Even if you have fuel in the carburetor bowl it may not get past a plugged main jet and that is the reason you use carburetor cleaner - it acts as the fuel. You may also have a sheared flywheel key but lets rule out the most common/obvious reasons first. Since you replaced the spark plug and ignition coil and have good spark we can rule out those parts for now. If you have spark at the right time (flywheel key not sheared), good compression (you checked it but didn't say what p.s.i. you have), the right amount of fuel and the right amount of air, theoretically the engine will start and run properly. If one piece of the above equation is missing the engine will likely not run well or not run at all. We need to find out what is missing and it sounds like fuel, at least for now. So go spray a shot of carburetor cleaner in the carburetor as previously advised and try starting the engine then come back and report your findings.

 

[eskandari_n1]

Ok, good. That helps a lot. It sounds like the engine cranks just fine but will not start. Try a shot of carburetor cleaner (remove air filter first) in the carburetor and crank the engine. If the engine starts and runs for a few seconds, then dies, you most likely have a fuel problem in the carburetor i.e. main jet plugged. Even if you have fuel in the carburetor bowl it may not get past a plugged main jet and that is the reason you use carburetor cleaner - it acts as the fuel. You may also have a sheared flywheel key but lets rule out the most common/obvious reasons first. Since you replaced the spark plug and ignition coil and have good spark we can rule out those parts for now. If you have spark at the right time (flywheel key not sheared), good compression (you checked it but didn't say what p.s.i. you have), the right amount of fuel and the right amount of air, theoretically the engine will start and run properly. If one piece of the above equation is missing the engine will likely not run well or not run at all. We need to find out what is missing and it sounds like fuel, at least for now. So go spray a shot of carburetor cleaner in the carburetor as previously advised and try starting the engine then come back and report your findings.

Sorry I forgot to mention I spray start fluid . did not start. I did not measure comprpression. I check it by removing SP and pluge by cloth and start the copmrassion cause to push cloth out.

 

[Lawnranger]

Sorry I forgot to mention I spray start fluid . did not start. I did not measure comprpression. I check it by removing SP and pluge by cloth and start the copmrassion cause to push cloth out.

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?