mars

Hi
The last time I went out with my boat, we were beach for a part of the day and when came time to leave I started the boat with the trim way up (forgotten to trim it down before starting the boat) and I heard a knocking sound coming from the outdrive, something like TOCK,TOCK,TOCK.

Needless to say, the boat was in neutral then I trimmed the outdrive down and then shifted forward, the same noise was still there, put in reverse, same noise, while giving more throttle the knocking came more frequent (forward, neutral and reverse).

This knocking is there no mather if I raise or lower the drive and the motor exhaust through the hub, no flaps rattling here

It sounds like a gear that doesn't completely engage or disengage. Any idea how to resolve this?

The outdrive have 275hours on it.
Thank you for your comments

GOODT

first pull drive and check u joints then we can go from there

mars

I know that I will have to pull drive out, but why the Ujoint? Even in neutral the noise is there

GOODT

the ujoints are still turning unless its a trs since you didnt say what it is Im guessing its a bravo which shifts in the upper of the drive itself, and running in the trailer or full up position puts aLOT of strain on the ujoints even in neutral



thats why they put a trim limit switch on them and a seperate trailer switch

mars

Thank you for telling me about the Ujoints and the way it works, for the drive it's a Bravo1, how about a bad shifting cable, could this cause the same noise. I will check this out as soon as possible

GOODT

no the bravo has whats called a cone clutch which uses friction to engage the gears so highly doubt it would be a shift cable

mars

I was thinking of the lower shift cable, if it is binding in the core and not letting the shift cone travel the full length of stroke. Is this possible?

GOODT

still woulnt make noise just wouldnt go into gear, unlike alpha drives the fwd and rex gears are always engauged to the input gear the cone clutch engages the pioion shaft to the proper gear.......hard to explain but this is why you dont hear a bravo shift as you do an alpha

mars

And if it is the ujoint the problem, is it expensive to repair.

You are making me thinking of a few times, not recently, when I shifted from neutral to forward or reverse and would say gust in between I sometime have heard a sort of bang or jerking and I could feel it in the handle, this append when I was to slow to put it in gear

GOODT

if shop knows what thay are doing its not hard, what area are you in????