For various reasons I haven't run my engine since May 14th. At that time it ran ideally, with no issues and idle speeds around 700.
Yesterday I started the engine and noted that it idled much higher - around 1100 rpm (in or out of gear), and would start to lug if I tried to adjust down the idle speed by moving the throttle stop.
I have changed nothing: no modifications to the boat whatsoever since I last ran the engine.
It ran well otherwise - moving in and out of gear without issue, and ran for around 40 minutes at approximately 2000 rpm (WOT was around 2500) with good temperatures and oil pressure, no blow-by etc.
I'm puzzled: any recommended diagnostics?
Yesterday I started the engine and noted that it idled much higher - around 1100 rpm (in or out of gear), and would start to lug if I tried to adjust down the idle speed by moving the throttle stop.
I have changed nothing: no modifications to the boat whatsoever since I last ran the engine.
It ran well otherwise - moving in and out of gear without issue, and ran for around 40 minutes at approximately 2000 rpm (WOT was around 2500) with good temperatures and oil pressure, no blow-by etc.
I'm puzzled: any recommended diagnostics?
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