This motor is very simple in design. Check for compression with a compression gauge. It is a single cylinder motor.
- Check to make sure the spark plug hole threads are not stripped or damage.
- This motor is direct drive system so when you pull the cord then the propeller will turn as well.
- Check for spark with a spark checker. ( This will give a idea if the ignition system is ok)
- check the lower unit oil for water or bits of metal (this can give you an idea if there is possible trouble in the lower unit.
- look for possible cracks are holes in the power head. The motor could have been overheated or run with poor oil mixture and thrown a connection rod.
- Check the tank for rust or severe gumming.
- If your compression is less than 70mmhg then the rings may have excessive wear.
The reason I reviewed all these points is for you to evaluate the motor and to decide if the asking price is worth it. With the above information you can negotiate a price.
Your motor uses the typical coil, condenser and points system. Carb kit is standard and easily obtained as well.
You can probably get a good running motor for about $200 to $300.
Couple of things for you to think about if you have no spark and if owner is unable to start the motor to evaluate.
No spark
1 coil $19.87,
1 set of points $7.97,
1 condenser $3.42 ,
1 spark plug $2.36
Fuel
carb kit OMC kit with float $15.30
Water pump (should change regardless)
impeller omc impeller $9.30
Total (not including shipping or taxes) = 58.22
That is if you have no other issue. (These are the most typical parts and kits purchased to restore a outboard to running condition)
It is a good running little motor when properly maintained. Proper fuel to oil ratio is 50:1. Would not hurt it to run a little richer on the oil maybe 40:1 or 32:1.
I have 1972 2hp Johnson and it is great for a canoe or pirogue.