Johnson 4HP SPARK PROBLEM

[Dinghyboater]

have a 1980 4 HP Johnson. Can't get spark at either plug. Have replaced plugs, condensors, one of the coils, cleaned the points, and still nothing. Checked continuity on the wires-OK There is no electric kill switch on this model. Any suggestions on how to trouble shoot this?

 

[Joe Reeves]

Re: Johnson 4HP SPARK PROBLEM

What's the model number of that engine? The 1980 model has solid state ignition (powerpack etc).

 

[Dinghyboater]

Re: Johnson 4HP SPARK PROBLEM

The model is J4BRHCRM. It is not solid state. There are 2 coils, 2 points, 2 condensors, 2 spark plug wires, and 2 plugs. Neither will produce a spark.

 

[Dinghyboater]

Re: Johnson 4HP SPARK PROBLEM

Correction, the engine I was inquiring about is a 1984

 

[Rick.]

Re: Johnson 4HP SPARK PROBLEM

Did you adjust the points to .020 when you cleaned them? Also check for worn wires under the flywheel. It unusual to have no spark to both plugs at the same time. Best of luck. Rick.

 

[Dinghyboater]

Re: Johnson 4HP SPARK PROBLEM

Thanks-I'll re-check the gap on the points, but I think it is OK

 

[Joe Reeves]

Re: Johnson 4HP SPARK PROBLEM

(Point Setting Of Magneto Models)
(J. Reeves)

Set the points as follows. Have the flywheel key aligned with the fiber rubber portion of the ignition points. Adjust the gap so that a .020 gauge will pass thru but a .022 will not. Should there be any question of the points being dirty (touching the contact with your finger would cause them to be dirty), clean them with a small brush and acetone or lacquer thinner.

NOTE: Should the operating cam have a small portion on it with the word "SET" imprinted, align this portion with the fiber rubbing portion instead of the flywheel key.