Logo
FULL SITE MENU

resurrect a 1990 Mecury 9.9 HP outboard

R

RobKaratzas

New member
Hi Folks

I acquired a 1990 Mercury 9.9 HP outboard (as well as the 1973 deep hull 14' aluminum Sea Nymph boat and 1996 Caravan trailer it was on).

The elderly gentleman who owned the above, stated that it was his fathers, and that it had NOT been used for 10+ years (and had probably less than 100 hours on the motor). I can verify the ownership from the name on the original purchase receipt and owners Mercury card.

My thoughts and questions:

1. The flywheel moves freely, which means the motor is not frozen up.
2. The pull starter only pulls out about an inch, so this is the first fix, which I think I'm good with doing (or buying the part) myself.
3. My guess is that I need to empty out the carburetor of any gas (and probably a good cleaning).
4. Spray something like fogging oil into the cylinders, just to make sure that there's some sort of lubrication in there.
5. Plugs already look good, and the overall cleanliness of the motor, good prop, as well the cleanliness under the cover are excellent.
6. I have the original manuals for the motor.

So, my bigger question is, somebody walks into your shop and shows you this relatively nice looking motor that grandpa owned, and nobody thinks it's been run for 10+ years, where do you start (other than the pull starter)?

Also, if anyone knows of a trustworthy shop around Jackson, Michigan, USA (49254), I would love to have them give it a once over and get this nice motor resurrected.

Thanks
Rob
 
I would put some oil in the cylinders. Roll that around a few times. Then do a compression test. While the plugs are out. Check for spark. If compression is good and you have good spark. Remove the carb for a good cleaning. And maybe a carb kit if needed. Put it back together. When you repair the pull start. Fire it up !
 
mechanicman said:
I would put some oil in the cylinders. Roll that around a few times. Then do a compression test. While the plugs are out. Check for spark. If compression is good and you have good spark. Remove the carb for a good cleaning. And maybe a carb kit if needed. Put it back together. When you repair the pull start. Fire it up !
Click to expand...

Any idea what that compression should be? (I have the regular manuals which came with the original purchase, but being a newbie to the forum I haven't had the chance yet to look through what shop manuals are available here.)
 
RobKaratzas said:
Any idea what that compression should be? (I have the regular manuals which came with the original purchase, but being a newbie to the forum I haven't had the chance yet to look through what shop manuals are available here.)
Click to expand...


Ah, at least I figured out the problem with the pull starter, with a little bit of lubricant of the Forward/Start/Reverse cable, the cable is now moving freely. So Start is really Start, which allows the cord to be pulled :)
 
Back
Top