Johnson 20R71S 20 HP

[LindenLongRods]

Picked this engine up for a song. Sat for 4 years. I got it started ran a while then stopped. I believe because I didn't have gas can vented. My question is If you got this engine what would be the first thing? Check Points, coil, condensors? Carb?

 

[hardwater fisherman]

My experience with any late 50s thru 70s OMC magnetos is that the coils are cracked and not good or have been replaced.

 

[racerone]

Install a new water pump impeller.-----Install a complete seal kit in the lower unit.

 

[LindenLongRods]

Install a new water pump impeller.-----Install a complete seal kit in the lower unit.

Yes I will order impellor tommorow, but seal kit also? Even if no milky fluid in lower?

 

[racerone]

Some will argue.----If I was going to use a 50 year old motor as my primary fishing motor I would install a seal kit.-----If you are fixing it to run so you can sell it then no.------Most buyers think that if a motor barks and roars then there is nothing that needs attention !!

 

[oldboat1]

Well heck, I'll argue a little. Install a new impeller, and drain the gearcase. While the l.u. is off, pressure test the gearcase with 5 or 6 lbs of pressure. Check for leaks with some soapy water in a spray bottle. Repair as needed.

Get an open air spark tester (cheap at an auto parts store), and test for spark. If the coil casings are cracked, however, replace them.

 

[LindenLongRods]

My experience with any late 50s thru 70s OMC magnetos is that the coils are cracked and not good or have been replaced.

I have an 1971 18 HP Evinrude, I just rebuilt but still can't get to run right. I will switch out Magneto or Points, coil and condessors

 

[oldboat1]

Think I would replace the wires as well (7mm with wire core).

 

[LindenLongRods]

Think I would replace the wires as well (7mm with wire core).

Ok I will order those, but I will just switch over the Points, coil, and condensors from the other motor,. I believe the components are compatible or it might be easier to switch out magneto plate

 

[oldboat1]

Consider switching assembled ignition plates at least for testing purposes, if compatible. (good idea)

 

[LindenLongRods]

The tune up kit is the 18-5006 or 5002?

 

[oldboat1]

was not able to confirm -- sorry.

 

[LindenLongRods]

was not able to confirm -- sorry.

Well I got a surprise when I took the flywheel off the Evinrude that I completely rebuilt and I think I figured out why it is not running right. Look at what happened to the new coils. i must not have tucked the wires away good enough. Can this be repaired or do I need to order new ones? Part number? Do you have a picture of what the wires are supposed to look like tucked away

 

[Crosbyman]

2 options maybe 3

• liquid tape... 2 coats or 3 and tuck away the wires
• remove the terminal (squeeze and uncrimp it) slide one 2 layers of heat shrink tubing one layer at a time.. reinstall a new terminal ....tuck away the wires
• just wrap it with electrical tape... not my favorite and...tuck away the wires

if wires look cut to much resplice (solder) a new 2 inches of wire and install heat shrink tubing and... tuck away the wires


should be fine to go after

 

[LindenLongRods]

2 options maybe 3

• liquid tape... 2 coats or 3 and tuck away the wires
• remove the terminal (squeeze and uncrimp it) slide one 2 layers of heat shrink tubing one layer at a time.. reinstall a new terminal ....tuck away the wires
• just wrap it with electrical tape... not my favorite and...tuck away the wires

if wires look cut to much resplice (solder) a new 2 inches of wire and install heat shrink tubing and... tuck away the wires


should be fine to go after

I will try