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B21 engine removal

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ejbtech1

Regular Contributor
"Alright!!!! I have posted to

"Alright!!!! I have posted to this forum for help on a 1980 Renken with the AQ120 that froze up.
I have my block ready for the parts transfer and transplant into the boat in the morning. I haven't taken the engine out of the boat yet. It is down to bare block.
I have removed and installed many engines, but not an inboard. I have a manual but want to double check here to see if there is anything I should know about taking this thing out.
Like I say, It is a bare block(short block). Are there any bolts holding the outdrive to the flywheel? Or is it just splined in there?
once I remove the bell housing bolts, the engine should seperate from the outdrive.....RIGHT? Thanks."
 
"Eric, the procedure is explai

"Eric, the procedure is explained in both the Seloc and the Clymer manuals and it is a bit ddifferent to the concept you have exposed. Basically, you either remove the upper gear assembly with the u-joints from the outdrive, or remove the whole outdrive altogether from the transom shield (I usually do the latter). Then, you have to remove the 6 bolts attaching the clamping ring on the outside of the transom shield to the bellhousing. Then, after you have removed wiring and piping/plumbing from the engine (and unbolt the engine mounts if installed), the engine can be pulled out with the bellhousing attached. Afterwards, unbolt the bellhousing from the engine block and it will come out with the splined primary shaft.

Take time to read either the Seloc or Clymer manuals, it is all explained there."
 
"I am confused as to why you w

"I am confused as to why you would have to pull the outdrive and take the engine out with the bell housing attached. You say that after the engine is removed that the bell housing can be unbolted and it will come out with the primary shaft.
If it is splined, why wouldn't you be able to just seperate the engine from the bell housing and pull it out? My bilge is big enough, or I should say, I have enough room to pull the engine forward about a foot.
Just a thought. The reason I am asking is because the outdrive has been coated with what looks like spray on bedliner for trucks. I can't get the bolts to break loos to take the outdrive apart.
Is it possible to pull the engine without pulling the outdrive?"
 
"Eric, you have asked about th

"Eric, you have asked about the procedure to remove the engine and I have explained it to you. It is not just the way "I do it": it is the way Seloc, Clymer and VP tell you to do it. If you think you are better off leaving the bellhousing in place, then do it (it can be done); but I can guarantee you that will be "the hard way".

The other thing is that, whenever you pull the engine, it is wise to take the occasion to renew the bellhousing bearing and seals."
 
"Thank you. I see what you are

"Thank you. I see what you are saying. I have the bolts out of the bell housing, and the engine won't budge.
My big problem is the bolts on the outdrive.....
I think I am going after another manual.This one is not explaining much.
Can you tell me how to get the upper gear housing off? I am going to have to replace the u-joint bellows anyway,now that I look at it. There is a big crack in it.
Not trying to change the way things are supposewd to be done, just lookin for a little "shortcut".
I appreciate the help immensely. Not trying to get anyone angry here."
 
"Eric, if there was an easier

"Eric, if there was an easier way, everybody would be doing it.
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What others normally do is to remove the upper gear assembly (two nuts and two bolts are all what keep the upper and intermediate assemblies together) and drive bellows, then remove the bellhousing clamping ring (6 bolts) and you are ready to pull the engine and bellhousing. I prefer to remove the two bellows and pull the outdrive aside after removing the two hinge pins, then remove the clamping ring. Either system works.

If the u-joint bellows is cracked and water found itsw way inside, the U-joints spiders will have to be renewed."
 
ok i have the two nuts and two

ok i have the two nuts and two hex bolts out. Does this thing usually need persuasion to get it apart? does it lift off the intermediate?
Can I take the u-joints out with the upper housing?
 
You may want to tap the upper

You may want to tap the upper gear housing gently with a plastic hammer or rubber mallet. The u-joints come out together with the upper gear housing. Seloc and Clymer explain this in detail (I hope you have at least one of them).
 
"Eric, if the universal joint

"Eric, if the universal joint is frozen it may be difficult to lift the upper unit clear. However, with persistance, it can be done. Try rotating the crank a little bit if that is the case."
 
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