07-23-2010, 10:15 AM #1
Half thru the season I need spark plug evaluation
Here are my 3 spark plugs pulled out after21 hrs of hard WOT riding with more compression and better fuel/air delivery.Here's cyl#1 first left
then #2 and #3
This is on amsoil oil injection, with an additional 1/2 oz per gallon because of the fuel controller. The color is dark brown, maybe a little ''rich", better rich than lean,no white powdery build up anywhere.I notice #1 plug slightly lighter, hard to tell in pic, is that normal? THANKS
07-23-2010, 12:31 PM #2
Use the "macro" function (usually a flower icon) on your camera next time you take pics that close up...they won't be blurry this way. IMO, plug readings taken at the tip don't really mean much...especially if you idled back to the dock and started the ski again when it was on the trailer.
07-23-2010, 12:51 PM #3
07-23-2010, 12:55 PM #4
I'd be more interested to see what the piston tops look like...IMO, they tell a better story than the plugs.
07-23-2010, 03:03 PM #5
Damn, I got a headache from looking at those, Dave!
07-23-2010, 03:57 PM #6
07-23-2010, 04:30 PM #7
- Join Date
- Oct 2005
are you sure you need to be adding oil to the fuel? I ran just 40:1 when my ski was similar to yours.
07-24-2010, 02:31 AM #8
running extra oil like that you might want to change the plugs every month
07-24-2010, 07:16 AM #9
Looks rich to me but I would say running the lil extra oil and that idle time back would cause that. If your that rich at WOT I bet you have build up on your pistons, rich is not always better than lean despite what most people say.
07-24-2010, 08:40 AM #10
Well,Andy you think there a little to rich,its more of a dark brown not black,ski runs fine.I,m following Jim Performance sticky on this:
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