Late 80's Mercury 4.5 Trouble Areas

[Captain Jeff]

Hello, Can anyone tell me what to check on a late 1980's Mercury 4.5 hp when looking to purchase? I am more knowledgeable with Johnsons/ Evinrudes. Are there any notorious trouble areas or problems with these motors? Should I do a compression check and if so what should it be on this engine? Thanks in advance.

 

[Laddies]

Re: Late 80's Mercury 4.5 Trouble Areas

It's a real trouble free engine, ck gear lube a hear it run before purchase

 

[Captain Jeff]

Re: Late 80's Mercury 4.5 Trouble Areas

Thanks Laddies. I may not be able to run it before purchase, does anyone know what the compression should be?

 

[Plainsman]

Re: Late 80's Mercury 4.5 Trouble Areas

Over 100 I believe is ok

 

[OldMercsRule]

Re: Late 80's Mercury 4.5 Trouble Areas

No reason not to start and run an engine that size IMHO. JR

 

[Captain Jeff]

Re: Late 80's Mercury 4.5 Trouble Areas

Thanks guys