Hammer knocking noise when in gear over 3000 rpm
#11
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If memory serves me -- didn't the Stihl boat have a drive fly off and some enormous speed -- I saw the video and it was a wild ride until they got it slowed way down. Glad no injury to you
3pointstar
#13
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Thanks guys, I'll try to get with him and try swapping the drives. Good idea on the insurance, it probably will cover the cost of fixing it, minus deductible of course.
#14
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A little late on results, but we put the Bravo1 drive on and it still has the noise, but not as loud maybe.
Then after some soul searching (Vacation to Lake Powell) we pulled the motor and don't see anything wrong with anything, like the coupler or flywheel. Then we pulled the valve covers to check for any broken rocker arms or anything bent: nothing. Then we pulled the pan and checked the main bearings and found nothing bad, or anything in the oil. Motor runs perfect by the way.
We are at a lose as to what is making this noise.
Unless someone has any grand ideas, I guess we'll put it back together and see if the noise is gone.
Then after some soul searching (Vacation to Lake Powell) we pulled the motor and don't see anything wrong with anything, like the coupler or flywheel. Then we pulled the valve covers to check for any broken rocker arms or anything bent: nothing. Then we pulled the pan and checked the main bearings and found nothing bad, or anything in the oil. Motor runs perfect by the way.
We are at a lose as to what is making this noise.
Unless someone has any grand ideas, I guess we'll put it back together and see if the noise is gone.
#16
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A blown head gasket will make one hell of a racket above 2500 rpm under load, did you check compression?
#19
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Thanks to everyone for the ideas!