How to check used engine

[geofs]

Hi,

I'm new here and to boating/outboards in general. I am considering buying a used fishing boat with an older 60HP Mercury, I'm guessing '70's-'80's. I haven't seen the boat/motor yet but have talked to the owner. He told me that the water pump needs replaced. In discussing further I asked if the water pump failure resulted in damage to the engine. He replied that he had the boat out back in June when it "started running rough and i looked back and seen no water coming from hole, so shut it down an used trolling motor to get back to shore." The boat and motor were taken home and parked in his yard and nothing more done to it to date. Note, we're in Ohio, freezing cold... I'm also concerned about lack of winterization. What should I look for in inspecting this motor to decide whether or not to purchase? I assume that making sure it will turn over to make sure it isn't locked up would be first, then a compression check to make sure it didn't damage the cylinders/rings? As I say, I'm completely new to outboards, never owned a boat before. The price of the boat is pretty low so if I have to spend some $$ on repairs it might still be worth it. Thanks in advance.

 

[DuckOfDeath]

Re: How to check used engine

I'd make sure to run the motor, if possible, and then do a compression check. As long as the foot didn't have any water in the lube, it should be ok. You may need an impact screwdriver to remove the drain screw in order to have a look for water or chunks of metal on the drain screw magnet.
The condition of the fuel and carbs might not let you get it started in sub zero temps but if the compression and lower unit check out, you should be ok. If it wont start, it may also help to have a spark tester so you know of any ignition problems before you buy.

 

[lindy46]

Re: How to check used engine

If it has even compression of 110psi or greater and no water or metal filings in the lower unit, it should be a good candidate for purchase. Good compression is key, as most other things can be fixed. If there is water in the L/U, it will probably need seals replaced. When checking compression, bring a can of fogging oil with you to spray in cylinders to lubricate them.

 

[sschefer]

Re: How to check used engine

It all depends on what you expect and what your willing to deal with. The engine is old, hasn't been stored properly and has a known problem. Personally, unless your getting it for free, I'd keep looking.

Money is tight right now and people are selling stuff they'd normally throw out with the trash. Be careful, the way that boat was stored tells me it was on it's way to the junk yard.