Join Date: Jun 2011
Location: somewhere south of civilization
Thanked 393 Times in 381 Posts
Rep Power: 9
Re: Shaft out of alignment - touching hull
On the hard you can align the engine but it will not necessarily be perfect. If the strut and shaft are good, then do the alignment on land and fine tune it after a few days sitting in the water.
The flanges for the trany/shaft connection are where you measure the alignment, not outside the boat where you see the problem. Undo the bolts and you will see if the two surfaces of the flanges line up. You will be working in hundredths of an inch here, not visually. You will need to loosen all 4 motor mounts and have a set of feeler gauges to use. The flanges must line up as nearly perfect as you can get them, both as parallel flat surfaces and the outer circumferences.
If the flanges line up or you cannot get them to line up at all, and you still have the offset where the shaft exits the hull, you have a bent or improperly installed strut or bent shaft. Spinning the shaft by hand against a fixed point, (a 2 X 4 clamped to the rudder, a stand, etc.) will tell you of a major bend.
Checking the alignment of the strut may be something only a yard can do, unless you have the specific tools.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Last edited by capta; 12-05-2014 at 06:58 PM.