D140 - DOM 042413 - Briggs & Stratton 40 V-Twin engine - 48" deck.
Runs normally for first 1/2 hour, then engine slows down. Runs slow (maybe 80% to 90% of normal RPM with throttle lever staying at same setting) for about 10 minutes or so and then goes back to normal RPM. Then alternates between running at normal and slow RPM in 10 to 15 minute cycles.
Fuel delivery and governor checked out okay. Friend was using mower and I heard it running from a distance and notice exhaust sounds...
D140 W/B&S 656CC V twin: Loses one cylinder intermittently.
Runs normally for first 1/2 hour, then engine slows down. Runs slow (maybe 80% to 90% of normal RPM with throttle lever staying at same setting) for about 10 minutes or so and then goes back to normal RPM. Then alternates between running at normal and slow RPM in 10 to 15 minute cycles.
Fuel delivery and governor checked out okay. Friend was using mower and I heard it running from a distance and notice exhaust sounds...
D140 W/B&S 656CC V twin: Loses one cylinder intermittently.
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