US1 Fountain

iTrader: (1)

There is a gasket set (more of an o-ring set) for drive removal. It's under $10. From West Marine or any Merc dealership.

1st thing is to raise the drive and unhook the speedo tube. Turns a few degrees, then lifts up.. Lower drive back down, remove 5 of the 6 nuts, remove the trim cyl rod, remove last nut, pull drive straight back and out.

Grease the u-joint, inspect the bellows for cracks.

Longrange4u

Can I lay it on its side or does it need to remain standing up?

US1 Fountain

iTrader: (1)

Laying it down is fine.

Longrange4u

Ok got it.. have someone from the local boat shop that will help me align the motor for a case of beer (I am buying the alignment tool for 50 bucks off e-bay)... Most the parts are here. I am getting close!!

I still need a good answer on this motor balance problem.... The block was built with the harmonic balancer and all balanced... I have the original flywheel that is weighted (matched to the harmonic balancer)... do I need to nuturalize it or leave it as is? Is there a way to test balance on an assembled motor?

Thanks guys!!!

offthefront

iTrader: (1)

The motor is balanced 2 ways .. either external or internal ..who ever built the motor should be able to tell you. If its internally balanced you will need NEW flywheel and HB ... If the motor is externally balanced you can use the stock parts .....

I have "heard" to make sure you use a "merc" alignment tool ..... not a generic one ... I dont know for sure ...I'm sure someone will chime in ........

Big Block Billy

A good machine shop can balance your flywheel to neutral.
They can also bolt two flywheels together and match their weight.
So they can make yours the same (in this case neutral) balance as another neutral flywheel. It's been done many times. I just had one done from external to neutral for a 588 Motor. BBB

Big Block Billy

Oh , the dampener would be same as a 427 if internal balance

offthefront

iTrader: (1)

Billy .. how much it cost you to balance the flywheel ? Thats the only problem I have heard thats its usually the time it takes a machinist to do the job ..can run as much as a new one ....but thats what I have "heard" ..dont know for sure ...

Longrange4u

Still need help on this one... I bought what I thought was the replacement plastic ring for this.... I was wrong. Any idea as to the part #?

28Eliminator

Longrange4u, this is all good info you are getting. Once the drive is off, reach in the back of the boat and spin the gimble bearing to make sure it is still good. It spins firmly but should be smooth. If it is bad you will feel it catching or loose as you spin it. Grease it and the u-joints.
Also look at the drive coupler where the splines of the outdrive goes into it. The splines should have a somewhat square tip on them like the outdrive shaft and not pointed. If they are pointed then it is getting worn out and now is the right time to replace it. I would hate to see you install your new motor and go testing just to have the splines stip out and have to pull the motor to replace it.
The part number of the plastic sleeve is 23-806922.
You can find just about any part # at this web site and order from there also. I have ordered many parts from BAM Marine and they do a good job.
http://www.mercruiserparts.com/

Good luck!