40 hp Oil Injection Mercury

Force 120

Petty Officer 2nd Class
Joined
Jul 20, 2009
Messages
115
Hello,
I have two of 40 hp Mercury Oil Injection Outboard. I would like to know the year of the.
The first one is OC201830 and the second outboard is OC280916 both of them made by Mercury Marine USA. OC280916 has the low compression on the third piston so I would like to take the power head of OC201830 to put on it. Then rebuild the power head OC280916.
Both of them look the same but I just want to know if I could switch it.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,739
OC201830is an 1989

the other is a 1990

should be almost identical, except for some minor parts vendor/suppliers lot numbers.
 
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