Checking a Johnson lower unit.

[LKaras1]

I just picked up a 1967 ( I think) Electramatic Super Seahorse 80hp Johnson V4al-19m that I am going to start parting out. How can I tell if the lower unit is any good before I do this? It has been sitting for a few years I was told. The prop spins freely now. I dont have the controls either if it matters. Thanks for any help

 

[HighTrim]

Re: Checking a Johnson lower unit.

It is a 67 by the way.

You could pressure test the lower unit to ensure that all seals are functioning and not leaking. The best way to test the mechanics is to water test it.

 

[LKaras1]

Re: Checking a Johnson lower unit.

It does not run, is there another way to check? Thanks

 

[tashasdaddy]

Re: Checking a Johnson lower unit.

it also has electric shift which you can check, but i don't remember sequence.

 

[LKaras1]

Re: Checking a Johnson lower unit.

it also has electric shift which you can check, but i don't remember sequence.

Wounldnt I need the controls?

 

[Faztbullet]

Re: Checking a Johnson lower unit.

If you have the old coil/spring type units you can apply voltage to wire and turn propshaft to see if you can feel spring tignten up. We had a electric shift unit tester years ago. In was a wooden bench with washing machine motor and tension lever on the bottom. A slot cut in bench allowed a belt from motor to come thru top to lower unit, which was clamped by skag in a large vice. Pulleys with set screws were slid over driveshaft (with no water pump) and attached to motor. A ground wire from battery was attached to vice and positive to a alligator clip to solenoid wires. Motor was turned on and tension lever pushed down to tighten belt. Motor spun unit @ 1800 rpm and by applying voltage could shift the units. Also worked on hydromechanical shifts. Fixed many units on this old bench.

 

[LKaras1]

Re: Checking a Johnson lower unit.

Cool thanx for the help