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Go Back   SailNet Community > On Board > Gear & Maintenance > 1993 2-stroke Yamaha - gear oil through weep holes?
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Topic Review (Newest First)
07-24-2012 11:51 AM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Thanks. Now for the Perkins 4.108 exhaust system - install that this week and maybe some sailing.
07-24-2012 10:14 AM
therapy23
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Good to hear you got it right.

It is a really great motor.
07-23-2012 11:04 PM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

If this engine is anything like the boat, at one point someone probably did rip it. A good mechanic is worth 20x what he gets paid but the bads one out number the good ones.
07-23-2012 08:00 PM
dabnis
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Quote:
Originally Posted by ccolton View Post
Hi Paul,

It sounds like you are an expert - I am definitely not! My method was to keep taking things apart until I had replaced everything and hoped that during the way I found something wrong!

Additional information that may help. This engine came with my boat. I know for sure that it had not been run for 2 plus years and like had not been run for 3 plus years. Sitting in the sun and having no maintenance at all probably contributed to the dryness. I agree, the ripped seal is a bit of a mystery. BTW, this was not an oil seal, which are very strong, but a rubber bboot type seal.

Chris
Not even close to being an expert on anything, just "been there and done that"
over the years, but thank you anyway. A "boot type of seal?" Of all the many Japanese products I have had they all had the great feature of not leaking oil, in addition to running perfectly. I would suspect that possibly some time back someone had it appart for some reason and damaged the boot when re-assembling it? Unless the boot had direct sunlight on it, or really excessive heat on it i doubt it would just dry out and crack?, but who knows?

Paul T
07-23-2012 02:01 PM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Hi Paul,

It sounds like you are an expert - I am definitely not! My method was to keep taking things apart until I had replaced everything and hoped that during the way I found something wrong!

Additional information that may help. This engine came with my boat. I know for sure that it had not been run for 2 plus years and like had not been run for 3 plus years. Sitting in the sun and having no maintenance at all probably contributed to the dryness. I agree, the ripped seal is a bit of a mystery. BTW, this was not an oil seal, which are very strong, but a rubber bboot type seal.

Chris
07-23-2012 01:50 PM
dabnis
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Good to hear, persistence pays off. If monofiliment fishing line gets caught in the prop it can wind up inside the prop and work its way around the shaft and into the seal, eventually destroying it. If the seals on the verticle part of the drive shaft failed that is a mystery to me. Of the eight outboards I have had over the last 65 or so years, I have never had those seals fail? Thanks for the feedback.

Paul T
07-23-2012 01:35 PM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Dear Group,
First, thank you for all your support and help!
On Friday, I received the remaining seals and gaskets necessary to rebuild the lower drive uint. Although I was somewhat trepedatious when I set the engine on a saw horse and lowered it into a garbage can of water, I was pretty confident that the gear lube leak was fixed. When I finally took the entire unit apart - yes, every piece and seal - several seals had been dessicated over time and others were actually ripped! The worst offenders, no surprise here, were related to sealing water from oil.

So, When running the engine, no problems with the leaking gear lube! I was very happy. But...

The engine stalled easily and ran rough. So, I removed the carburator and took it apart. Clean as a whistle! Not what I had hoped for. But, I also took off the gas filter and found water mixed with gas plus a few bugs. Cleaned and replaced everything and then set the gap on the spark plugs - again to be sure.

The engine is now running like a charm!

Thanks again.

Chris
07-06-2012 11:01 AM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Dear Therapy23,

I feel for you. In 2003, after having rebuilt a differen 9.9, it, along with the new dinghy, was stolen! I also had a dinghy with a 6 hp stolen in St. Marten.

Maybe I should learn from this? Oars?

Chris
07-05-2012 08:48 PM
therapy23
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Nice you can still get parts.

If mine had not been stolen it would have been nice for me too.
07-05-2012 03:07 PM
ccolton
Re: 1993 2-stroke Yamaha - gear oil through weep holes?

Update: After receiving all of the ordered parts, my son and i began to remove all of the old parts...and realized that I had missed one! So, since I need to place another order, I think I will remove and clean the carburator and see what needs to be ordered there. I will be back.

Thanks again.

Chris
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