Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Tecumseh 10 HP, no spark!


medmike's Avatar
Member

Join Date: Feb 2010
Posts: 3

02-10-10, 07:03 AM   #1  
Tecumseh 10 HP, no spark!

Short version....had blown 8 hp Tec. for snowblower (HMSK80-155693X). Got 10hp Tecumseh new short-block (LH358XA-159493Y), swapped out crank and cam shaft (needed the pto shaft from blown engine to drive snowblower wheels) and both are solid state ignition. Everything came together like a dream, the blocks are identicle save for slightly larger piston. I have good compression, but no spark!. Checked spark plug in spare snowblower, works fine. Have SSI so ordered new one thinking coil was bad, still no spark.
I am using old flywheel also, but as long as magnets line-up with the solid state ignition, shouldn't I get a spark (gapped to 0.012) if SSI is functional?
Do I need to use the 10 hp's original flywheel for some reason? No grounding issue that I can see (only using spark plug boot to spark plug).

What do ya think?
Thanks in advance!

 
Sponsored Links
smallengineguy's Avatar
Member

Join Date: Jan 2007
Posts: 514
MA

02-10-10, 08:05 AM   #2  
10HP flywheel, not the same as 8HP different PN#,

 
medmike's Avatar
Member

Join Date: Feb 2010
Posts: 3

02-10-10, 08:52 AM   #3  
Thats what I was thinking...but shouldn't any magnets from pretty much any fly wheel cause the ssi to fire if gapped right?

 
smallengineguy's Avatar
Member

Join Date: Jan 2007
Posts: 514
MA

02-10-10, 09:45 AM   #4  
Look at where the keyway is in relation to the magnets, most likely different and this would effect timing

 
hopkinsr2's Avatar
Member

Join Date: Feb 2005
Posts: 1,561
Non-US

02-11-10, 08:25 AM   #5  
Make sure the air gap between the coil & the magnets is .08~.10 inch & the coil is mounted with the correct side toward the engine... I'm thinking as long as the magnets spin past the coil, you should get spark,, but I don't know what the differance in the 2 flywheels.... Roger

 
medmike's Avatar
Member

Join Date: Feb 2010
Posts: 3

02-11-10, 09:30 AM   #6  
Thanks....you have helped alot. I wont tell you how stupid I feel with the mistake I made, well anyway, I was not using the solid state ignition "stand-off" posts, so the coil was not over the magnets properly. Somehow I missed transfering these from old to new engine!
The posts push the ssi out over the flywheel far enough now...have a spark! Engine started 1st pull (now it vibrates excessively, but thats for another day).

Thanks again....

 
Search this Thread