Engine removal help

[bretth2o]

I was given a 1988 fourwinns with a 5.7 wich was seized I am now trying to remove the motor and cant seem to get it out. I have removed all of the bolts around the bell housing also losened the two bolts behind the housing and still the engine will not come out can anyone help. Thank's Brett:

 

[flargin]

Re: Engine removal help

I was given a 1988 fourwinns with a 5.7 wich was seized I am now trying to remove the motor and cant seem to get it out. I have removed all of the bolts around the bell housing also losened the two bolts behind the housing and still the engine will not come out can anyone help. Thank's Brett:

If you are dealing with a typical Mercruiser, you have to take the outdrive off first, then there are typcially 4 mount points (2 front mounts and 2 connecting to the transom) then it will pull straight out.

If not, what type of motor/outdrive are you using.

 

[bretth2o]

Re: Engine removal help

I have a omc out drive I have never done this before and dont know much. This seems to be alot different than cars.

 

[bretth2o]

Re: Engine removal help

I thought that by removing all of the bell housing bolts I could pull the motor straight out. I have already removed all of the. In order to pull the out drive its just six bolts on the out drive which is on the outside of the boat? I am sorry for my ignorance but this is all very new to me. I do appreciate you taking the time to help me. I am replacing the engine with a 1979 305 out of a caprice I know I have to replace the head gasket and freeze plugs anything else i should do?

 

[flargin]

Re: Engine removal help

You may want to start in the "Adults Only" link. there may be a service manual on your boat/motor.

you have already done about 50x as much work as needed Boat motors are relatively easy to work on, but see if you can find a manual, if there is not a link available in the Adults only, it is worth EVERY PENNY to buy one off of Ebay or elseware.


I don't know anything about the OMC, sorry, but I have a feeling the key problem right now is the outdrive shaft is stuck into the "transmission", which is bolted to the flywheel. You will not be able to pull it out unless you take the outdrive off. on a mercruiser it is as simple as taking off the trim pistons (one nut), and then removing the 6 mounting bolts and pull backwards.

Sorry cant give you OMC specific help..

 

[danond]

Re: Engine removal help

OMC is the same as Merc. I agree with the previous poster - you've done a huge amount of work in vain.

You need a manual. Now. You're right - it's not a car, it's a boat! You're going to wreck something trying to guess your way through it, then you'll be introduced to what real painful expense feels like.

The drive has to come off. There is no transmission in a boat. You have a splined driveshaft coming from the upper housing of the outdrive that passes through a rubber bellows, is supported by a gimbal bearing then it goes into the interior of the engine compartment, straight into a rubber coupler that's bolted to your engine's flywheel.

Now that you've yanked your coupler and driveshaft vertically (which they were never designed to have done to them) you'll want to have it all checked out before you re-assemble to make sure there's no permanent damage.

Oh - and did I mention you need to get a manual?

 

[AnthonyY]

Re: Engine removal help

I just pulled my 4.3 chevy with a omc drive tonight. There was a thin peice of sheet metal covering the bottom of the flywheel(about 7 3/8" bolts). Maybe yours has this too.

 

[danond]

Re: Engine removal help

There is no need to remove any covers on an OMC Cobra drive.

Pull the outdrive, disconnect shift and throttle cables, trim power connector, engine harness, harness ground wire, positive and negative battery cables, exhaust sleeves, front motor mount lag bolts, rear engine mount nuts, disconnect trim sender plug, water inlet hose, power steering pressure and return hoses from the steering assist unit, fuel line, pull the engine forward about 2" and then up and out.

You guys need to use manuals to do this stuff. It will make your lives easier!

 

[bretth2o]

Re: Engine removal help

I removed the six bolts on my out drive and I can not get it off it spaced out about a inch and thats all. Any tips?

 

[danond]

Re: Engine removal help

It'll take some work. The driveshaft is probably stuck in the gimbal bearing. You're going to have to find a way to pull harder on it. Slide it forward, jerk it backwards. Not sure what else to tell you.

It's stuck because it needed to come off, so it's good you're removing it. It shouldn't require much effort at all. Bet you find some rust in there (there shouldn't be any)!

While you're online, go to eBay and order a manual. Not sure if I mentioned that or not yet.

 

[bretth2o]

Re: Engine removal help

Thank you very much for your help and knowledge. I am going back out to try. By the way I didnt try lifting the motor straight out. I lifted it about a half inch and then tried to pull the motor forward sitting on the boat deck. Thank you once again. Brett

 

[danond]

Re: Engine removal help

You're welcome, and good luck!

By the way - re-installing a new engine requires an alignment tool (can be found on eBay) and proper alignment procedures.

...again, found in an OMC service manual.

Keep us posted.

 

[AnthonyY]

...

 

[danond]

Re: Engine removal help

I like ... better.

 

[chrystler70]

Re: Engine removal help

an inboard is not fun. i helped my cousin pull a 350 out of his cabin cruiser. was not easy

 

[bretth2o]

Re: Engine removal help

Should be in drive OR NEUTRTAL

 

[300sflyer]

Re: Engine removal help

A "manual" will have that info.

Mercs have to be in forward. No idea if OMC is the same...

 

[AnthonyY]

Re: Engine removal help

I was looking through these posts and thought I would tell Danond that maybe you should read the manual again. Section 17-6/ 17-9/ 17-11of the omc manual says the drive can remain installed if you are not disturbing the motor mount height. I unbolted the mounts out of the block and took the 8 or 9 little bolts off the lower flywheel cover (section 17-16 picture 87 shows the little cover that you said you do not have to remove)and used a forklift to take the tension off the motor and slid it off the shaft very easily with the flywheel and coupler undisturbed. It is now back in the boat and running great. And whatever crack you was trying to make about ... then maybe you should hit the books and give advice that you can back up.

 

[Bondo]

Re: Engine removal help

Section 17-6/ 17-9/ 17-11of the omc manual says

Ayuh,... Which 1,..?? Written by Whom,..??

 

[Bt Doctur]

Re: Engine removal help

Bondo, maybe he has the stringer model manual and not the cobra model one?