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Shaft Alignment Raptor 440


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#1 Paulj

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Posted 05 October 2019 - 08:53 PM

Has anyone aligned the shaft coupler? I decided to check mine today. Took the bolts out and found mine is over .020 out on the top when tight at the bottom. My rear mounts are almost all the way down. I'm thinking that I'll need to raise the motor mounts in the front but they seem like they're going to be a bitch to get to. Any suggestions?

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#2 Paulj

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Posted 06 October 2019 - 01:07 PM

Update, port side front is tight but reachable. Starboard side is impossible with the wrenches I have. Will need to get a thin wrench and make a special tool for it. Almost no room to work. Any tips?

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#3 oldsmobiledriver

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Posted 07 October 2019 - 04:00 AM

I’ve only done the older 350 based engines. And that engine is more narrow so it’s not bad....


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#4 Paulj

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Posted 07 October 2019 - 08:56 PM

Well I was able somehow to get the jam nut loose. Once I got it loose there was still no way to turn the bolt from the top. I decided to see if the bottom lock nut was tight enough on the bolt to make the bolt turn....sure enough that was the trick. I ended up cutting an old 15/16 wrench down to about 7 in long. Got the alignment perfect so that not even a .0015" feeler gauge will slip in between to coupling. Feeling pretty accomplished today. After 200 hrs on the boat the shaft alignment was out over .020". I strongly suggest checking alignment during annual service.

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#5 oldsmobiledriver

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Posted 08 October 2019 - 03:56 AM

Agree, the book says to check it every 50!


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#6 jjolin01

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Posted 08 October 2019 - 06:12 PM

Where would i find the procedure for shaft alignment?



#7 oldsmobiledriver

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Posted 08 October 2019 - 06:19 PM

YouTube has some decent videos of generic shaft driven alignments


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#8 Paulj

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Posted 09 October 2019 - 11:56 AM

Yes, they just don't have anything on how to get to the starboard motor mount under the exhaust manifold.

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#9 jjolin01

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Posted 10 October 2019 - 07:59 PM

I was hoping we had a sticky for it on an MB






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