Engine stalling problem

[Dave R]

Originally Posted by bigdog

Two Black Dogs, great idea to check the ignition wires, will do tonight!

However.....
Woodsy you may have unravelled this mystery when you stated
'If the motor runs great for 20 -30 minutes or so on the hose, then misfires & dies.... its quite possibly the coil'

I have been running the engine on the hose for 20-30 and seems to run fine, real smooth, even rev-it to 2200RPM without issues...... Then about the 25-30 minute mark, it starts to mis-fire & dies !!!! Exactly as Woodsy stated !

Could it be the coil heating up, then mal-functioning ? One could only hope !
Could be just the coil wire, and not the coil, or maybe both?

As a few have stated, there's no real way to tell if the coil is bad?
How much do these little buggers cost ?

Still going to try wire night-test to check wires.

All comments appreciated !

Thanks,
Bigdog

You can check the coil with an ohm meter and a toaster oven. Measure the resistance from - terminal to the high voltage output cold, then heat the coil up to 200 degrees and measure again. Should be little difference. That said, a new one is like 28 bucks from Napa (Sierra part number L47-5433 is liekly what you need).