1981 Johnson 150 HP General Info

D

djwalters

Cadet
Joined
Nov 17, 2003
Messages
27
I am in the process of buying a boat with a 1981 Johnson 150 HP outboard. Just need some general feedback before I drive 400 miles to look at it. (1) Are there common problems? (2) Any items I should look for? (3) What would be a good compression value? (4) Are they gas hogs? (5) Should it push a 18.5' tri-haul boat above 40 MPH ? (6) Are these supposed to be oil injected? (7) Are they a reliable motor? (8) These arn't electric shifts are they? (9) Anything else? Thanks so much, Dave
 
JB

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: 1981 Johnson 150 HP General Info

Howdy Dave.<br /><br />1. Common problems? Not that I know of.<br />2. Look for evidence of neglect, water in gearcase.<br />3. All cylinders should be over 90psi and within a 15psi range.<br />4. Yes.<br />5. Yes.<br />6. No.<br />7. Yes.<br />8. Not electric.<br />9. Get an on-the-water demo. Watch for easy start, good tell-tale stream, smooth idle and accelleration, WOT for 5 minutes without getting overheated. Do not accept a demo without a load on the engine.<br /><br />That is a crossflow engine, rated at the crank. It is not as strong as the later looper 150s (rated at the prop), uses more fuel. That said, it was a very good engine for 1981.
 
D

djwalters

Cadet
Joined
Nov 17, 2003
Messages
27
Re: 1981 Johnson 150 HP General Info

Thanks for all of the answers. I really appreciate it. Dave
 
You must log in or register to reply here.
Top