This page has several links to repair videos for clutch removal ,spark testing and fuel line replacement.

YOUR CHAIN SAW OR CAR QUIT RUNNING NOT SURE IF IT HAS SPARK OR INTERMITTENT SPARK?

THIS TEST LIGHT WILL TELL YOU FAST.

I HAVE USED THIS TYPE OF TEST LIGHT ON A 1991 240 VOLVO , 1988 944 PORSCHE, 1958 SPRITE, AND MANY MAKES OF STRING TRIMMERS AND LAWN MOWERS

IF THE BLINK IS STEADY AND BRIGHT THE SPARK IS GOOD. IF NO SPARK OR THE SPARK IS INTERMITTENT, THEN YOU NEED TO FIND THE CAUSE

THE 1991 VOLVO WOULD JUST UP AND DIE AFTER 8 MINUETS OF DRIVING. AFTER COOLING DOWN FOR 20 MINUETS, IT WOULD RESTART. BY USING THIS TEST LIGHT, I FOUND THAT IT HAD NO SPARK. THE CAUSE WAS A BAD ENGINE SPEED SENSOR.

WITHOUT THE TEST LIGHT, THIS REPAIR WOULD HAVE COST MORE THAN 300.00. THE PART COST 60.00 AND was EASY TO INSTALL

SOLD OUT WILL BE MAKING MORE SOON