81 430 XC won't start

I'm restoring an 81 430 XC. It has a SEM ignition which has no spark. I replaced it with a Motoplat internal ignition and now have good spark. I think the timing is close enough to start it. Tried staring it but I can't even get a pop. Seems to be getting gas. Just wondering if the internal Motoplat is compatible?

have you tried a new plug with the motosplat?

Yes.

repleacing the stator means the timing could be pretty far out. maybe have to actually use a dial indicator and set it before progressing

If you have nothing to check the TOP DEAD CENTER with remove the spark plug use a long pencil very carefully. Raise the piston up where you can just see it touch it with the pencil and run the piston as high as it will go. Now turn the crank till the pencil starts to move down. Mark the flywheel. Now rotate the crank the other through the TDC till the position just starts to move down. Now Mark the flywheel and split the difference between the two marks that's your TDC.

I'll double check tomorrow and let you know the results.

Do not use a pencil.
Have had to take many top ends off because they got broken off, use a metal rod or long thin screwdriver.
Later george

I did this method very carefully on the antique single cylinder engines that had no timing marks on the crankshaft and they had magnetos. Being rope start you think a husky can kick back think about your hand and arm on the rope instead of your leg.

Good advice George! I suffered the embarrassment of doing that on my 510 fourstroke.....:-(. Hey that pencil was handy and it was the right size and..and..and!