Pearson 365 and 367

"But like a dumb a** I reused the old coupler."  Coupler?

A u-joint will be visible when it fails.  The little pins inside will disintegrate. so the joint will be loose, visible rust etc. Grab the shaft and look for movement. I don't think there is a zirc fitting on this one so you would have to remove the caps to lubricate.  Lubing it won't fix the problem, it just prolongs the life of the joint.

V-drive alignment is critical. You need to be within +/-.003 inch of perfect.  There are numerous how to threads on this site.

1850 rpms?  Is that at full throttle?

Hi,
Over the winter, I fixed a loose strut and replaced the shaft bearing.  Also installed a max-prop.  But like a dumb a** I reused the old coupler.  I also didn't check the shaft for any bends, except for a very casual look down the shaft where it looked straight. 

When I re-launched, the shaft had absolutely no movement at idle, so I thought I was good to go.  But at cruising RPMs and above, there is enough vibration to shake both the shaft and the V drive itself.  Its not much, but its visible.  I'd say about 1.5mm of play.  I don't think there is any discernable movement at the U joint, but with the V drive itself shaking, I can't tell which part of the drivetrain is causing the shake.

I re-aligned the V drive the best I could, and I can now get it up to 1850rpms without any visible movement.  I imagine a bent shaft or a bad coupler will show up at any RPMs.  So now I am wondering if I have a worn out U joint. 

How could I check the U-joint?  Any chance that lubing it will fix the problem?  Any way to check it without removing the U joint?  Thank you in advance. 

..so whats confusing on these is their rating for only 90kg.. "Bushings DF-2207-2" are rated 450-750lb (204-340kg).. Considering engine weight 227kg + gearbox in case of knockdown, high seas god forbid capsize.. I have doubts they will hold..
I wrote to parts4engines if its typo, their response:
"This is the rating per mount and also shows the deflection at that weight rating. 227kg is the weight of the whole engine and each mount takes up to 90kg. when all mounts fitted this is compatible to take your engine weight.
We have had no issues reported in the many years of selling these mounts."
 

seems parts4engine did some "extensive research".. the advantages looks legit..

https://parts4engines.com/en-pt/products/perkins-4-107m-engine-mounts?variant=45144679973105

P.S.
Another thread to read on this topic - https://pearson365.com/index.php?topic=392.msg1528#msg1528

The web host moved servers and copied an old forum database, so the messages (and user) created after December 10th are gone. I've asked them to attempt a recover of what was the current database file, but I think it's unlikely. Sorry. Sometimes I feel like I'm the guy who picks the wrong girlfriend every time.

Thank you very much for keeping this running!

We upgraded the forum software tonight. Please post here if you encounter any problems.

Thanks. The strut is already moving. Its almost a rattle though still a if that makes sense. Would I still be able to get away with not re-sealing the holes? I put up a video on the p365 owners Facebook group. I didn't notice a leak in particular - the hull under the engine was dry. I wonder if the seal can still be good if the movement of the strut is that bad. Maybe i am misunderstanding how the seal is done from the factory.

The screws themselves appear to be badly corroded or fused to the strut. Maybe it's just the growth and patina that makes it look like that.

I realigned my strut a while back.  The bolts are flat head machine screws, the plate is not threaded.  Be careful to not rotate the machine screw because that will break any sealant that is left.  I don't remember clearly, but I vaguely recall that the sealant was silicone.  Consider replacing the machine screws and rebed new ones.  It's probably not much more work than tightening them up and you won't have to worry if you broke the seal or not.

I updated the link to pics in that SVJourney posted so you can see more pics.

For future referrence: Dale's pics are here - https://pearson365.com/forum/index.php?msg=4603

Interesting reading - https://goodoldboat.com/adding-inner-forestay/