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UJoint Boot on 270 Outdrive

E

econman

New member
"Is the U-Joint area lubricate

"Is the U-Joint area lubricated by lower unit oil or motor oil coming from rear of motor? I noticed oil sheen in water on pull out. I can't find a hole in the boot, but it had some oil on port side of boot and what looks like slight cracking."
 
"The u-joint area is supposed

"The u-joint area is supposed to be dry. The bearings in the spiders are filled with grease.

You may want to remove the hose clamp securing the rubber bellows to the outdrive, then pull the bellows towards the transom shield. Once free from the outdrive, you can see its condition. If wet, that's a bad sign: you would have (at the very least) to install a new bellows, usually new spiders, and sometimes new primary shaft bearings."
 
"Thanks El. I just pulled the

"Thanks El. I just pulled the boot back and out came oil and brown water, mostly oil though. The out drive oil is clear as can be. The engine goes through a little. I must be leaking out the rear main into this area. The liquid was probably 95% oil and 5% water total was maybe 4-6 Oz. I've used this boat 5-times this season. This last time I noticed a slight sheen coming from outdrive when I was pulling out. Do you think the whole ujoint area should be replaced. What seals are at the rear of the motor? do I have to pull engine to replace the seals? I have a Seloc manual, but wanted your opinion first before I park this thing for the year. This is why I like a fixed system with no metal bearings to get wet, except the ones that are suppose to be wet."
 
"I think it is virtually impos

"I think it is virtually impossible for engine oil to reach the bellows. If the engine leaked through the rear seal, it has the flywheel to deflect any oil leaks, and the rest would go to the bilges. Even if engine oil reached the primary shaft, it would have to go through two seals and one or two bearings, plus the absorber. If what you have in the bellows is actually oil, it most likely comes from the outdrive. But remember, it could be also grease part of what you see.

You may want to replace the drive bellows and examine the spiders. Probably a good idea to replace teh spiders as well if you haven't done so in a long time or if you are not sure of their condition."
 
"Thanks again, When I pull tha

"Thanks again, When I pull that lower unit, will the spiders come out with the drive? The spiders look very clean other then they are covered with oil. They were replaced by previous owner last year when he did an engine swap. I've ordered a bellows. Is it common to get drive unit oil out the top? Maybe it was overfilled last change."
 
"It is not uncommon to have a

"It is not uncommon to have a bit of oil in the drive bellows. However, even if the spiders were replaced last year, they do not like being exposed to any amount of water.

The Seloc and Clymer manuals explain how to remove the upper gear, etc. When you pull it out, the whole u-joint assembly also comes out with it.

You may also want to download this manual.

http://www.mybayliner.co.uk/boatmad/280285290.pdf"
 
I think I may get lucky. It wa

I think I may get lucky. It was more like 99.5% oil and .5% water. I let it sit and there was very little water. I think the boot has a pin hole in it at most. I was going to pull the drive instead of the upper gear housing. I read where you need to pressure test after opening the gears. I don't have that capability. I will let you how it goes. Thanks for your help.
 
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