WTCrap? Falling parts?

[MisterDetroit]

SO I dropped the lower off of my 507Y8c (88' 50hp Force) to change the impeller, the engine was overheating so I figured it was a good place to start, well that and the thermostat. onec I brought the lower down I noticed this little rubber boot that was split completely down the side and have no idea what or where?
While I had the lower off I thought wise of it to "rinse" out the leg of the gunk that had built up inside, so with my garden hose I sprayed out said leg and a small gear fell to the ground.
HELP!!!! I have orderd a manual for this but have yet to receive it in the postal. Might anyone be so kind to tell me WHAT these parts are and WHERE they go. I am on holiday for the weekend and would fancy getting some use of my boat.
Please see the pictures below. Cheers!

 

[Frank Acampora]

Re: WTCrap? Falling parts?

The rubber boot is a seal to help keep water out of the hardened steel crankshaft nose. This prevents rust and cold welding of the stainless drive shaft into the crankshaft. It is not absolutely necessary and you can reassemble the lower unit to the engine without it. Just coat the driveshaft splines with a little anti-seize.

The splined piece looks like it may be an adapter to match the splines of the driveshaft to the crankshaft splines. I have never seen one of these before. Are you European or Australian? It may be specific for export engines. Is it splined inside as well as on the outside?

EDIT: If you rinsed the inside of the leg with water, be certain to spray some WD40 or equivalent up there and into the crankshaft. Without it you will probably develop rusting and that's bad for the next time you want to remove the lower unit.

 

[Poncho Villa]

Re: WTCrap? Falling parts?

The rubber piece may be your crankshaft seal that should slide on the driveshaft just to the end of the splines. I understand it will sometimes stick in the case and fall out as it's done with you. Mine comes out still on the driveshaft. Since it's split, you'll likely want to replace it.

As for what appears to be a short splined shaft, I'm not certain that I recognize that. It doesn't appear to be broken from your drive shaft as the ends of the splines look beveled.

 

[MisterDetroit]

Re: WTCrap? Falling parts?

The splined piece looks like it may be an adapter to match the splines of the driveshaft to the crankshaft splines. I have never seen one of these before. Are you European or Australian? It may be specific for export engines. Is it splined inside as well as on the outside?

Thank you for responding! I am in the USA the motor is North American as well. The splined piece is a solid piece and dimpled on one end. my fears are that I may have to remove more of the motor to place this part back into place. In all the diagrams I have found I see no such splined piece
As for the boot. Would this go directly over the shaft towards the water pump or up at the top of said shaft? I have found a diagram (listed below) that shows the lower and it's contents but I am not sure if I am looking the the right part. I think this part #1. Might I be correct?

http://www.boats.net/parts/search/Merc2/Force/50%20H.P.%20(1988)/507Y8C/GEAR%20HOUSING/parts.html

 

[fucawi]

Re: WTCrap? Falling parts?

If you are sure the splined bit is 100% not broken off the drive shaft then it can only be a spacer from inside the crankshaft to stop the drive shaft going up too much ..I would epoxy it onto the top of the drive shaft and see if you can push it all back into place ...are you sure that the crankshaft is not made in parts heat shrunk onto splined joiners inside the journals ..have seen this on suzuki etc ....good luck

 

[MisterDetroit]

Re: WTCrap? Falling parts?

If you are sure the splined bit is 100% not broken off the drive shaft then it can only be a spacer from inside the crankshaft to stop the drive shaft going up too much ..I would epoxy it onto the top of the drive shaft and see if you can push it all back into place ...are you sure that the crankshaft is not made in parts heat shrunk onto splined joiners inside the journals ..have seen this on suzuki etc ....good luck

Very Good Point mate! I believe you may be correct, as with further investigation, I find no other place for this part. I will indeed try to fit the lower WITH the spacer and then WITHOUT to see if there is much freeplay. I may not get this done today as I will have to order the shaft seal.

 

[fucawi]

Re: WTCrap? Falling parts?

If you can push the gearbox all the way into position with the spacer in place then you found its location ...put it in first then the seal ..maybe the seal stops it falling out ......

 

[MisterDetroit]

Re: WTCrap? Falling parts?

Well My part came in today and low and behold it looks nothing like the original. Upon picking up the piece I asked if it was the correct part and was told that this part succeeds the old part number as it is now obsolete. wish me luck in putting this all together. Oh BTW the old part was quoted at a price of $1.35 and the new part number was just under $30. Someone is making a killing off this.

 

[MisterDetroit]

Re: WTCrap? Falling parts?

Ok so I have the whole lower unit back together and I am trying to attach it to the motor leg but.... That "spacer" we talked about above will not go into the crankshaft without a fight. I have it superglued to a piece of quarter round molding right now and hioe to be able to tap it into place later (once I am sure they have dried). Not sure that I am going about this the right way as this "spacer" just fell out when I dropped the lower unit and I feel that it should slide into place just as easy. Any help would be appreciated

 

[Frank Acampora]

Re: WTCrap? Falling parts?

Leave the damn thing out! it doesn't belong in the crankshaft nose. I don't know what it is or where it goes but I am certain it is NOT a spacer that inserts into the crankshaft splines.

 

[bentle]

Re: WTCrap? Falling parts?

I would agree with the last thread. It doesn't belong in there. I looked at the manual for your
Motor andd it doesn't fit to, in or on anything. If you have splines on both ends of you drive shaft
then all is well. Please don't try to force that thing up in anywhere cause then you will have prob. If it doesn't fit with ease then don't force it.

 

[MisterDetroit]

Re: WTCrap? Falling parts?

I did just as Frank suggested and left "the DAMN thing out". Thanks for backing him Bentle. I got everything back together and the DAMN thing still shows no tell tail signs of water pumping through such as H2O coming out of the exhaust ports. I am about to pull the lower off again but I am not sure why or what it is that I am looking for. I am at THAT point Yeah the as is on craigslist point. HELP :facepalm:

 

[wickware]

Re: WTCrap? Falling parts?

Are you deep in a barrel or backed into floating position in a lake etc? I d/n like the muffs if they fit because they are forcing water vs pumping IMO. CraigsList is not the solution, UNLESS this is not your enjoyment/fun/past-time/etc.

Could the splined section have been in the work-space from another project? Were the splines identical in numbers, spacing and dia to your splines on the shaft? Do you know the shaft went into your crank from your propeller?s movement? With no water If you have not seem movement, we might not be out of the woods and possibly another sleeve/adapter is close by. jow

 

[bentle]

Re: WTCrap? Falling parts?

Only backing up the part about it not belonging in there. I did check the manual for
your motor and I couldn't see that part by itself anywhere on there. Didn't want to
See ya force that little thing up in there and later find out it shouldn't and later find out oops now how do I get that damn thing outa there.

 

[MisterDetroit]

Re: WTCrap? Falling parts?

I am using only muffs I can pick up a barrel tomorrow. The shaft when inserted without "DAMN" extra thing does reach the crankshaft and when I spin the flywheel by hand the prop does spin. The diameter of both the shaft and this extra piece are the same. The spline count, the only difference is that the extra mystery piece looks more worn than the splines on the shaft. The Craigslist comment was more less a symbol of my frustration I do love my boat

 

[bentle]

Re: WTCrap? Falling parts?

I understand. These little but great things can be so frustrating. No fun having a
broken boat especially when we want to use them. The muffs should work well
Enough though so as not to overheat. Can you list the things that you have done
already and then I hope myself or someone can help you from there?

 

[MisterDetroit]

Re: WTCrap? Falling parts?

Can you list the things that you have done
already and then I hope myself or someone can help you from there?

I think we have been doing that. But to catch you up, I have replaced a seal at the top of the waterpump, a shaft seal at the top of the shaft and the thermostat. I inspected the impeller and pump housing and they look well.

 

[Frank Acampora]

Re: WTCrap? Falling parts?

You did replace the drive pin for the impeller, didn't you? The small pin that looks like a needle bearing and plugs into a hole in the side of the shaft. It did not shear off on you did it?

 

[MisterDetroit]

Re: WTCrap? Falling parts?

Yes I did replace the drive pin under the impeller. I will be disassembling it again tomorrow.

 

[bentle]

Re: WTCrap? Falling parts?

When I got my B.O.A.T. force outboard I had overheating prob. at idle but when I
raised the rpms up a bit then it cooled right down. Turns out that my impeller
needed replacing. I know that on your first thread you stated that you pulled lower
Unit to replace impeller but on your update you didn't mention that you replaced
it. Mine looked great in the housing but it really wasn't. If you haven't done that yet
then it might not hurt to give it a go?