View Full Version : OMC Piston check
Snickers89
06-21-2021, 08:09 AM
Too rich, about right, or too lean? Help me out. Sorry for pic quality. 1996 225 Johson
489105
489106
489107
489108
489110489109
bigbore
06-21-2021, 09:28 AM
The color of it kinda looking like it’s burning a bit hot/I’d probably jet up 1-2 on main/n down the same on mid n idle jets/could riches up gas oil mixture a bit to/go 40:1.
bigbore
06-22-2021, 08:53 AM
If your running vro just mix 1 pint xd50 oil with every 10 gallons of fuel
Snickers89
06-22-2021, 11:13 AM
appreciate the feedback. I've been running 1oz oil per gallon gas in addition to the VRO. that is the result that see above.
I ran double oil for 10 hours of break in and about 40:1 since (at 20 total hours now)
I've ordered new jets and will change out when they come in.
Most of the spark plugs look okay to me except for one but I'm far from an expert hence why I asked.
bigbore
06-22-2021, 05:56 PM
Cool/go up for mains/probably 64d’s/down for mids/the upper one on left side a carburetor throat/just under that one is the idle jet/n down the same on that one.probably start with 66d’s n see if u notice a mph change/if not go up 2 more to 68d’s n when u see a mph drop/even if it’s only a mph or 2 go back down to where u were before the mph drop/n the same for mids n idles throughout the process n that should be perfect for running a long time that way.
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