First time checking alignment, might have a problem...

sleeper

Petty Officer 3rd Class
Joined
Aug 26, 2008
Messages
86
My boat is a 2008 mercruiser 4.3 and alpha 1. The mercruiser manual that came with my boat said to check engine alignment every 3 years or 200 hours, but the boat had an engine that was damaged by the dealer before I bought it and had the be replaced under warranty at the end of last season. That being said, I wanted to check alignment this winter to make sure it was right since the engine had been out.

Bought the tool, and just checked the alignment. The bar slid in but was tight, so I greased the end and checked and the grease was deeply grooved on the top of the tool and not on the bottom. I raised each front mount nut about 2 flats and checked it again. The bar slid right in, and the grease marks looked even. Then I made a mark on the crank pulley and turned the engine 90 degrees. The bar got really tight going in. I turned the engine another 90 degrees and the bar was really tight going in. I turned it the final 90 degrees and the bar slid right in easily.

So I have two positions of the engine that are really tight, and two that the bar slides right in. (four positons of 90 degrees each) I checked with grease in each position, and it appears that the top and bottom of the bar are fine, and that the tightness is showing on the sides of the bar.

Is there something that I am doing wrong, or does this indicate a bad coupler or problems with the rear mounts? I will wait a few days and check it all again thoroughly and make sure I cannot adjust it again and make it better.

The boat is still under factory warranty, but I hate to deal with the dealer again because when I had the engine replaced under warranty they were very difficult to deal with.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: First time checking alignment, might have a problem...

If the alignment changes when you turn the engine, the coupler is bad.
End of story.
More times than I care to count, I've installed brand new OEM coupers that were bad right out of the box.
 

Fisnfool

Petty Officer 2nd Class
Joined
Aug 19, 2008
Messages
133
Re: First time checking alignment, might have a problem...

Sad but true. I hate getting out of spec merc parts. Does anybody actually have quality control anymore?

It effects everything. I just bought a 3 dot red dot bow sight and the internal tube was installed backwards :eek:. If you looked in the eyepiece, you were looking at the LED projector. How the ell did that get out of the factory. :confused: They are all supposed to be checked and turned on when they install the original battery.

Must have been the last one after a Friday " sake lunch"
 

sleeper

Petty Officer 3rd Class
Joined
Aug 26, 2008
Messages
86
Re: First time checking alignment, might have a problem...

Is a coupler covered under the manufacturer's warranty?
 
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