'79 Johnson Tiller Purchase... Things to check on a used outboard before buying?

[shooter5636]

I'm looking at picking up a '79 Johnson 35hp tiller. I'm mechanically inclined, but most of my experience is with cars and trucks. What should I check prior to laying cash on the table for the motor?

Obvious things to check:

-Starts easily and runs
- Compression (hopefully he'll let me hook up a compression gauge)
- Check LU oil for water contamination

Any other tips on things to check? It'd be greatly appreciated!

 

[Crosbyman]

cracks... anywhere....

compression testing should be agreed to otherwhise who knows....

http://boatinfo.no/lib/evinrude/manuals/1971-1989johnsonevinrude.html

 

[jasper60103]

I'm looking at picking up a '79 Johnson 35hp tiller. I'm mechanically inclined, but most of my experience is with cars and trucks. What should I check prior to laying cash on the table for the motor?

Obvious things to check:

-Starts easily and runs
- Compression (hopefully he'll let me hook up a compression gauge)
- Check LU oil for water contamination

Any other tips on things to check? It'd be greatly appreciated!

Ask for a boat test. A weak LU won't reveal itself on land.

 

[shooter5636]

The '79 was a no go.

Found a '78 35hp Johnson for a good price. Compression test came back at 82 on both cylinders cold. Started super easy and idled well.

I want to pull the trigger but the compression values worry me.

 

[jakedaawg]

Also check wires at the red plug. Many of that age have deteriorated insulation and corroded wires. Engine side harnesses are NLA and a bear to make yourself.

 

[boobie]

If possible, take it for a good water test.

 

[ondarvr]

The '79 was a no go.

Found a '78 35hp Johnson for a good price. Compression test came back at 82 on both cylinders cold. Started super easy and idled well.

I want to pull the trigger but the compression values worry me.

Is that with a good gauge you've used before? Gauges frequently read way off from the actual PSI.