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How does this plug colour look?
Hi guys,
I'm not a plug reading guru by any means so looking for some info from people that know what they are looking at.
These 2 different plugs (first copper, 2nd iridium) are new out of the box and 3 passes old (couple of minutes of wide open throttle, then turned off straight away and checked)
Motor details -
Tohatsu/Nissan 50hp (700cc 3cyl 2stroke)
Shaved head
Ported
Tuner
Reeds
Standard airbox
revving to 7000rpm
I think they look a tad lean?
Thanks in advance
They look pretty lean to me. Also from something an old boat racer show me it looks like your timing is way advanced.
kk
my timing has been brought back 2 deg less that standard
I've seen a few plugs that looked that way, yet the motor ran okay. The reason why is ethanol fuel--it "looks" different.
My late buddy's drag car ran on pure methanol, and there was absolutely NO color whatsoever on the plugs.
Jeff
"We live at the bottom of an ocean of air." - General Marvage Slatington
Tell us what fuel, oil and oil ratio you are using.
" Three may keep a secret if two of them are dead" Ben Franklin
" ------- well Doctor what have we got a Republic or Monarchy? A Republic he replies if you can keep it"
Benjamin Franklin, 1787 Constitutional Convention, as recorded by signer James McHenry's in his diary at the Library of Congress
Location: SW Orlando, Fl
98 octune unleaded. Mineral oil run at 40:1
No methanol or ethanol blend
Is that E free fuel. What brandOriginally Posted by RWN50
mineral oil?
" Three may keep a secret if two of them are dead" Ben Franklin
" ------- well Doctor what have we got a Republic or Monarchy? A Republic he replies if you can keep it"
Benjamin Franklin, 1787 Constitutional Convention, as recorded by signer James McHenry's in his diary at the Library of Congress
Location: SW Orlando, Fl
i'm seenin , needs more fuel. best to keep bumpin it up till the boat slows down, then go back a bump or two,
Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
What kind of fuel mixture/oil u running?? different oils will show alittle diff. on plugs, but it does look to be lean. I think i would bump up your jets size and read them.Hi guys,
I'm not a plug reading guru by any means so looking for some info from people that know what they are looking at.
These 2 different plugs (first copper, 2nd iridium) are new out of the box and 3 passes old (couple of minutes of wide open throttle, then turned off straight away and checked)
Motor details -
Tohatsu/Nissan 50hp (700cc 3cyl 2stroke)
Shaved head
Ported
Tuner
Reeds
Standard airbox
revving to 7000rpm
I think they look a tad lean?
Thanks in advance
Let it all Hang out
163 or 165 main jets?
Daren Goehring
63-R
DSH, 500ccmh, 750ccmh
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