50 Hp 1989 lower end problem

[tiller7104]

Hey, and thanks for looking at my problem!! I have a 50 hp mounted on a 17 foot Maxum bow rider. My buddy hit a rock in the river and wiped the prop and broke the bolts that mount the foot to the leg. I rebuilt everything just as the manual said. It ran fine for a weekend then oil dumped out of the lower end and the engine bogged down and would not climb up in the rpms. Before I take this apart again does this sound like I did something wrong? It almost seems as if water got in the foot or oil got into the leg? Any sugesstions?

 

[roscoe]

Re: 50 Hp 1989 lower end problem

Could be alot of things, from improperly installed seals, to a bent driveshaft. Almost impossible to diagnose from here. Could be two separate problems, the lower unit, and the rpm problem.<br /><br />Must have been some rock, to break off those bolts, OUCH !

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Hey, tore the foot down yesterday and a rubber boot fell out? I think it is the seal for the top of the drive shaft, if so os that a hard job to replace that? I need to order a new one my old one is torn. And yes it was a big rock, it did not break the bolts it pulled out of the aluminum houseing. I ordered a lower end seal kit, but from the pictures it does not appear that seal is included? Could that have caused a moajor problem if that boot was improperly installed?. Thank you for the reply and I look forward to your imput. Thanks Stuart

 

[Docdoc]

Re: 50 Hp 1989 lower end problem

If you are referring to the seal the driveshaft goes through into the lower unit, it should not be real hard to install, just be sure all of the old seal has been removed and the area is clean. use a light coating of grease on the seal and then press it into the cavity until it is flush with the top. Be careful so as not to damage it in the process if you are using a block of wood and hammer to "press" it in. The only thing I know of on the driveshaft up near the power head would be a "washer" that merely slides on over the driveshaft. Maybe someone else has more ideas on that.<br /><br />If repairing the lower unit doesn't help your problem, then it may be you have internal damage in the powerhead (bearings).

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Doc thanks for the info....I replaced all the seals in the foot, prop shaft seal, seal for the drive shaft the top of the foot (having the foot off looking down at it). The piece that fell out when I dropped the foot looks like a rubber boot, ID is the same as the drive shaft and about inch and a half long. Is there a boot/seal up into the bottom of the power head? I am at a lose...I have rebuilt tons of evinrude and merc lowers but this force is a new animal to me! I am ready to throw it into the river! LOL Any Ideas?

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

"The washer on the drive shaft" I think you are refering to doc is the brass pressed on ring? that is there! The little rubber boat has me stumped! Thanks I do not have a repair book on this outboard could anybody look this up for me? I am just waiting for "Steelespike" to tell me to buy one LOL that is what he tells everybody!

 

[roscoe]

Re: 50 Hp 1989 lower end problem

Think you are referring to #1 in this diagram, driveshaft sline seal.<br /><br /><br />

<br /><br /><br /> http://www.mercruiserparts.com/Show.../35.png&inbr=1282&bnbr=160&bdesc=GEAR+HOUSING

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Yes, that is what it is. How the heck do you replace that? Is that rubber?

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

I think I am picking it up here...is that what the brass ring does, holds it up on the shaft?

 

[Docdoc]

Re: 50 Hp 1989 lower end problem

Tiller: Just goes to show, neither of the force 50s (88 and 89 models) that I own have that rubber boot on the drive shaft. I presume it serves some purpose, but both motors ran fine without it. Steelespike is right, a repair manual is a must if you are going to work on your own motor.

 

[roscoe]

Re: 50 Hp 1989 lower end problem

Don't know for sure, but think it was a boot to protect from corrosion, so that the driveshaft splines would not get stuck.<br />I have a feel ing that most of these motors are missing that boot.

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Thanks guys, I have half a mind to put it back together with out it, This boat runs fresh water in the river and it very pampered. I replace the water pump twice a year because it eats impellers for lunch, so I will keep an eye on it. I can't see this boot acting as a seal, as roscoe said it is most likely a corrosion protection. I have one more question for you guys because you all seem very well rounded with boats, I purchased Vertglas and I am going to try it on the stripe on my 1989 Maxum. There is alot of debate on scouring pad verse wet sanding. Do any of you guys have an experience with this? <br /><br />P.s. I bought a service manual on ebay today. Does any body know, Steelespike is Steele his last name? Because it is mine ! Just curious...as always I am very greatful for your help guys, it is nice to know there is a place to come to reassure yourself before going out on the water and having heartburn about weather you you repaired something right! Thanks Stuart Steele

 

[TOHATSU GURU]

Re: 50 Hp 1989 lower end problem

The boot on the driveshaft is designed to keep salt from sticking the driveshft to the crankshaft. That's all it does.

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Outstanding, thanks for the imput I am going to coat it with antiseize and stick her in. Thanks....still looking for some imput on Vertglass? Anybody have good/results...or heard of any?

 

[eurolarva]

Re: 50 Hp 1989 lower end problem

you might try the boat restoration forum or general boating questions forum. On your impeller are you using the six or 12 blade impeller. My chrysler eats the 12 blade ones as you mentioned however the 6 blade ones last a couple of seasons for me.

 

[Docdoc]

Re: 50 Hp 1989 lower end problem

Replacing the impeller twice a year is kinda ridiculous. You might want to try the 6 blade like eurolarva suggests, or take a look at replacing the water pump body.

 

[tiller7104]

Re: 50 Hp 1989 lower end problem

Humm..I do use the 12 blade because I was told gives better performance....I know it seems to move more water in my Evinrude 85hp...but yes it is a pain to replace the impeller twice a year. As for the water pump body, I will try that, short of polishing the inside of it I have tried everything. I will order one, has to be better than dropping the foot twice a year! Thanks guys, I am sure I will be back with more questions about this ahhhem outboard ! Enjoy your holidays and hope to hear from you soon.

 

[TOHATSU GURU]

Re: 50 Hp 1989 lower end problem

The 12 blade is the heavy duty impeller that is suggested for commercial and abusive use. The 6 blade is the one that was actually stock...However, the 12 blade does not pump as much water, it just lasts longer(in theory).

 

[jnosnibor]

Re: 50 Hp 1989 lower end problem

Originally posted by tiller7104:<br /> Hey, and thanks for looking at my problem!! I have a 50 hp mounted on a 17 foot Maxum bow rider. My buddy hit a rock in the river and wiped the prop and broke the bolts that mount the foot to the leg. I rebuilt everything just as the manual said. It ran fine for a weekend then oil dumped out of the lower end and the engine bogged down and would not climb up in the rpms. Before I take this apart again does this sound like I did something wrong? It almost seems as if water got in the foot or oil got into the leg? Any sugesstions?

 

[jnosnibor]

Re: 50 Hp 1989 lower end problem

I am just starting a lower unit disassembly on my 89 Force SN 3267 to replace the impeller. How do I determine what type unit I have (Types A-D) in the Seloc manual. None of the descriptions seem to fit mine. Sorry I'm no help on your oil loss problem. Jerry<br /><br />

Originally posted by tiller7104:<br /> Hey, and thanks for looking at my problem!! I have a 50 hp mounted on a 17 foot Maxum bow rider. My buddy hit a rock in the river and wiped the prop and broke the bolts that mount the foot to the leg. I rebuilt everything just as the manual said. It ran fine for a weekend then oil dumped out of the lower end and the engine bogged down and would not climb up in the rpms. Before I take this apart again does this sound like I did something wrong? It almost seems as if water got in the foot or oil got into the leg? Any sugesstions?