Mercury, 4MH, 2019
by Joe Geiger
(Denville, CT, USA)
Engine will start and idle okay and runs as as throttle is advanced but within a couple of minutes it sputters and shuts down. Had run this new motor without problem only about four hours last season. Always used non-ethanol fuel and put it away for winter after running motor to use all fuel in carburetor hoping this would reduce risk of varnish like settlements in carburetor over winter storage.
I tried using Sea-Foam additive in fuel which at first seemed to help but then the problem continues.
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