Winterizing Question...

Likesspace

Cadet
Joined
Aug 25, 2016
Messages
17
Hi Guys,

I have a Mercury, (re-branded Yamaha), 50 HP, 4 stroke, 4 cylinder outboard that is either a 1999 or 2000 model year.
After reading the manual concerning the winterizing procedure I have a question.
It says that I am supposed to pull the spark plugs and put a "small amount" of motor oil in each cylinder. I'm then supposed to rotate the timing belt to distribute the oil throughout the cylinders.
My question is: What is a small amount? Are we talking a teaspoon or less or more?
Also when I go to start the motor next spring do I need to pull the plugs again and rotate the motor to blow any excess oil out of the cylinder?

This is my first year winterizing the motor so I'm sort of at a loss. Any help you can give will be appreciated.

Thanks in advance,
Dave
 

flyingscott

Fleet Admiral
Joined
Apr 8, 2014
Messages
8,234
Get some fogging oil and just give it a good spray each cylinder. When you start it in spring it will smoke and will be normal.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
Messages
51,368
Don't forget to change oil and gear lube
 

wrench 3

Commander
Joined
Aug 12, 2012
Messages
2,108
If I'm oiling cylinders I put in three pumps from a squirt oil can. If you either jump the starter solenoid with the key off or crank the engine over with the spark plug wires grounded, it will blow out any excess oil and be ready to start in the spring. (The spark plugs have to be out when you crank the engine)
 

Likesspace

Cadet
Joined
Aug 25, 2016
Messages
17
Thanks for the replies.
I ordered some fogging oil which should arrive tomorrow. While I'm off for the Thanksgiving holiday I plan on finishing up the winterizing process. The lower unit oil and motor oil was changed about 25 hours ago so I wasn't planning on changing it again. But I did check to make sure there is no water in the lower unit.
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,620
The lower unit oil and motor oil was changed about 25 hours ago so I wasn't planning on changing it again. But I did check to make sure there is no water in the lower unit.
I would be changing both of those.

I put 30 hours on my Mercury outboard engine this year and changed mine. I did both the previous tear during that winterization
 
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