Hi MF,
If you're referring to a problematic Kirby Lauson or an early flogged out Briggs, well frankly my dear I don't give a damn or in other words I couldn't give a rats toss bag (to quoin a phase from Malcolm Blight) as there's plenty of better choices out there now to power a Scotty.
Cheers,
BB..
Yeah i have 3 sitting here,, all no spark. New briggs 3.5hp for $270 is hard to beat