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- Prior Lake, MN
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I'll reach up into the grate and check play tomorrow. Previously I just grabbed the shaft between the motor and mid bearing, doing this from inside the engine bay.I’ve never seen any reports of exhaust leaks on these boats, and you’d smell it in the engine bay if it were leaking in there.
Withe engine off and locked out, can you reach up into the intake and see how much play there is in the shaft ? You could get someone to help you so you can look at the coupler in the engine bay to see if there is any play there as well.
Does your engine run smooth? If it is missing or running rough at idle you could be hearing the lash between the impeller shaft and the short shaft that goes through the intermediate bearing. I know you checked it, but based on what I heard from your vid and what I’m trying to piece together in my head it sounds like the rubber dampener between the engine and the drive shaft that goes through the intermediate bearing is bad since it smooths out when you raise the idle.. speaking of idle, what rpm does the motor idle at?
Engine seems smooth to me, other than this rattle. I get 7600 rpm WOT. Maybe it's missing at idle? Poor plugs with low voltage from the stator causing a miss? I can't recall idle rpm, but I want to guess it's around 1500, I'll check that as well tomorrow.