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Spark lead resistance value.

Discussion Forum at MarineEngine.com » Johnson Evinrude Outboard » Archive through July 02, 2009 » Spark lead resistance value. « Previous Next »

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Steven O.
Member
Username: sashko12

Post Number: 5
Registered: 06-2009
Posted on Wednesday, July 01, 2009 - 08:47 am:   Edit Post Delete Post View Post/Check IP

What resistance value (Ohm) should be across spark leads on Johnson 60ESL-70D motor?

When checking for continuity and doing some rebuilding on the leads I found that one of my leads has 0.19 Ohms, and the other two 1.14 Ohms each. Which is good?

Also, there was some brown grease-like hardened substance on the end of the leads that screws into the distributor. Aren't those supposed to be clean?
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Joe Reeves
Senior Member
Username: joereeves

Post Number: 7561
Registered: 02-2001


Posted on Wednesday, July 01, 2009 - 10:44 am:   Edit Post Delete Post View Post/Check IP

The brown grease is what is called "Type D" grease and is required to help prevent the arc from shorting to ground.

If you're speaking of continuity from one end of the plug wire to the other end, it should register as a dead short.... no resistance.
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Steven O.
Member
Username: sashko12

Post Number: 6
Registered: 06-2009
Posted on Wednesday, July 01, 2009 - 11:45 am:   Edit Post Delete Post View Post/Check IP

Where should that grease be: just in the rubber boot or/and in the area where the lead is screwed internally into the distributor as well?
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Joe Reeves
Senior Member
Username: joereeves

Post Number: 7565
Registered: 02-2001


Posted on Wednesday, July 01, 2009 - 06:32 pm:   Edit Post Delete Post View Post/Check IP

Proper method is to have the grease in the bakelite threasded portion of the distributor cap, then screw the plug wire in.
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IBNFISHN
Advanced Member
Username: ibnfshn

Post Number: 631
Registered: 11-2005
Posted on Wednesday, July 01, 2009 - 08:56 pm:   Edit Post Delete Post View Post/Check IP

Both those resistance readings are fine. You can read that much from the meter leads alone.

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