I've had a 1975 90hp since 1980 still runs great. I always add a little extra oil and change the water pump every 3 years just to make sure it doesn't get hot and fry the motor. I did change the distributor from points to electronic have had no problems. I have it on a Glastron Carlson and pull grand kids on ski and tube. I here alot of people bad mouth Chrysler, but sometimes the problem with the motor is the dummy driving.
Butch
You can purchase a Yamaha outboard motor online at www.ebay.com. Also if you have a Yamaha distributorner you,it is possible they carry used motors
What is the value of a good running 1972 100 HP Johnson out board motor
E-how.com has been there for me in many of my must learn situatations. Ehow is also a good place to start searching for information on outboard motor maintanance. http://www.ehow.com/way_5468513_mercury-outboard-engine-maintenance.html
probably around $1,000 to $1,500 at the most
What is the value of a good running 1972 100 HP Johnson out board motor
Depending on the motor you can use Max Rules. They have a pretty good database for years and hp info.
anything over 100 on all cyl is fine and a good motor
If it's in really good condition, about $250.
Chrysler V8, yes. Cummins diesel, yes.
Gap should be 0.20 if you are regapping old points 0.18 Good luck!
NADA good condition about two grand
KA 39 is a 1939 johnson 9.8hp Good motor I have a restored one