85hp Merc?

[Chris1956]

Merc 650's were three-cylinder, two carb motors. The 50HP, 80HP and 85HP motors of that era were 4-cylinder, 2 carb models, if anyone cares.

 

[cesandroid]

Alot of good feedback on these motors..Thanks guys! So the motor is sold. Just like that.. hopefully the new owner got a good deal or maybe they have parts for it.

 

[Nordin]

Late 60es (68-69) and early 70es (70-71) 650 were 4 cylinders.
The 3 cylinder 650 was from 72-76.

 

[racerone]

The 3 cylinder was still produced after 76 as a 70 hp ( powerhead rated ) and later as a 50 or 60 prop rated.

 

[redneck joe]

The 3 cylinder was still produced after 76 as a 70 hp ( powerhead rated ) and later as a 50 or 60 prop rated.

Not to derail thread but this is close enough I think. On the ratings, I have an 82, 50 hp 4 cyl but also snagged an 87, 70 hp 3 cyl. So would there be any real increase in performance if I got the 70 running and swapped it?

 

[racerone]

I never really liked those 3 cylinder 2 carburetor motors.

 

[Chris1956]

The 70HP is a 40% increase in power, on paper. Those 50HP/4cyl were real good motors, such that Merc made it longer that one would expect, as they were really popular, and ran well. If the motor is 70HP/4 cylinders it may be real good as well. I have NOT heard (no direct experience) good things about the 3 cylinder, 2 carb 650 carb inline motors. from the mid 70's. Just what I have heard.