1984 MerCruiser 120

62cruiserinc

Petty Officer 1st Class
Joined
Oct 30, 2009
Messages
295
Hello:

I just bought a 1984 Larson with a Mercruiser 120 I/O. The engine is a 4-cylinder and it says 2.5L on a plate on the outdrive. I bought the boat because it was in exceptionally good conditioin for a 28-year old boat. The outdrive looks like it was only a few years old when you look at it.

The previous owner had a cerebral hemmorhage a few years ago and can't use the boat anymore. A friend of the owner is handling the sale of the boat for him. It's obvious that the boat was well maintained and protected . He says it was garaged whenever it wasn't in use.

The ad for the boat says the "motor needs work". When I asked the seller what that means, she said the owner remembers that it needed work but doesn't remember what was wrong. So the motor needs something, but it could be anything from a tuneup to a cracked block. I don't know if it was winterized before its last use or not.

My question is: How do I approach the motor issue?

Do I try to start it first?

Replace oil, ignition system components, fuel filter, etc first?

Are there some special checks that can be done on the motor to check the block for cracks?

I am familiar with car engines and have rebuilt them, but this is the first marine engine I am working on.

Thanks for the help
Steve
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,079
Re: 1984 MerCruiser 120

Ayuh,.... Welcome Aboard Steve,.... I just posted in yer thread in the general boatin' forum...

Have a look through Here,....
Pay extra attention to the Summerization, 'n Winterization threads for a heads up on the annual service needed...
You'll also find the Maunals up there...
 
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