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Author Topic: Not Easy to Choose Spark Plugs for Outboards These Days  (Read 10193 times)

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Offline David CVX-16

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Re: Not Easy to Choose Spark Plugs for Outboards These Days
« Reply #20 on: November 09, 2017, 05:46:57 PM »
Look at the condition of the plug when you take it out.  Plugs running too hot and there can be pre ignition or detonation. Plugs running too cold and the engine will miss/foul and the idle will be poor. 
« Last Edit: November 09, 2017, 07:39:38 PM by David CVX-16 »
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David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline V153

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Re: Not Easy to Choose Spark Plugs for Outboards These Days
« Reply #21 on: November 09, 2017, 06:36:47 PM »
Bingo Mike. Surface gaps are used when there's no room left to have an electrode pokin into the combustion chamber. And or no way to index a conventional plug.
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'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline Hot Rod Roy

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Re: Not Easy to Choose Spark Plugs for Outboards These Days
« Reply #22 on: November 15, 2017, 07:46:42 PM »
Quote from: Plugcheck on November 09, 2017, 08:31:17 AM
As for my moniker, in my early days of boating, really not too long ago, I would spend a lot of time checking stuff and getting ready for getting on the water, but in my haste and excitement, I would forget to put the bilge plug in.

Oh!   That kind of "Plug Check"!

 8)
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1950 Chris Craft/Mercury
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1960 CVN-65/280,000 hp
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