Tecumseh LV195SE lawn mower engine won't start.

[StarTech]

LV195EA-362044D

Being an L had it would not hurt to check the valve clearances

In .004 Ex .008

 

[Rivets]

When you cleaned the carb, did you remove the idle jet, under the black plastic cap, and make sure it was open in both directions? Also, did you replace the float needle and seat, part 631021 and rest the float level slightly rich?

 

[Dave T S]

Couldn't of installed the new coil upside down possibly. That can also cause starting issues in some cases.

Well, that is possible but would I still get spark to the plug if the coil were upside down? Would low compression play a part in my challenge?

 

[Dave T S]

When you cleaned the carb, did you remove the idle jet, under the black plastic cap, and make sure it was open in both directions? Also, did you replace the float needle and seat, part 631021 and rest the float level slightly rich?

I'll check the idle jet one more time, thanks. How do I rest the float level slightly rich? I'm a novice, thanks.

 

[Rivets]

Set the float so it is slightly lower on the side opposite the float pin.

 

[Dave T S]

Set the float so it is slightly lower on the side opposite the float pin.

I'll try later this week, thanks.

 

[Rivets]

I should have added that’s when the carb is tipped upside down.

 

[Dave T S]

I should have added that’s when the carb is tipped upside down.

Got it, that's what I was thinking, thanks.

 

[Oddjob]

I am not a pro so take my thoughts with that in mind. You may indeed have a carb problem, but if that were your only problem then the engine would have started and died when you had spark and used the starter fluid. Only two other causes for a no start when you have fuel and spark. Compression is one and ignition timing is the other. As other more experienced folks have noted, valves can cause low compression. Cylinder wear will do the same. I kinda suspect ignition timing coupled with low compression. I know you said the flywheel key was intact, but sometimes they don’t shear and it is hard to see if they moved by just looking on top. I would take the flywheel off and see if the slots align. Even if I’m wrong, that would get you closer to solving the mystery by completely eliminating timing as an issue. Not so great compression together with slightly altered timing may result in a no start condition.

 

[Dave T S]

I am not a pro so take my thoughts with that in mind. You may indeed have a carb problem, but if that were your only problem then the engine would have started and died when you had spark and used the starter fluid. Only two other causes for a no start when you have fuel and spark. Compression is one and ignition timing is the other. As other more experienced folks have noted, valves can cause low compression. Cylinder wear will do the same. I kinda suspect ignition timing coupled with low compression. I know you said the flywheel key was intact, but sometimes they don’t shear and it is hard to see if they moved by just looking on top. I would take the flywheel off and see if the slots align. Even if I’m wrong, that would get you closer to solving the mystery by completely eliminating timing as an issue. Not so great compression together with slightly altered timing may result in a no start condition.

Thanks. I've taken the flywheel off and the key/slot are intact and inline. Cannot get it to turn over getting both spark and fuel. My only thoughts are its very low compression. Would that be a plausible theory? Thanks.