How does this plug colour look?

[RWN50]

Thanks everyone for the info. The 98 octane is not an E fuel its just pump gas over here in australia.
using Valvoline mineral oil at 40:1

Mercguy, they are the standard tohatsu jetd which are 132 or 135's i think from memory.
What are tou running in the one in you avatar?

[Fastjeff57]

Yikes! That sucker is really running lean. At least there's no aluminum flakes on the plug ceramic.

Jeff

[mercguy]

Thanks everyone for the info. The 98 octane is not an E fuel its just pump gas over here in australia.
using Valvoline mineral oil at 40:1

Mercguy, they are the standard tohatsu jetd which are 132 or 135's i think from memory.
What are tou running in the one in you avatar?

run 135's in all 3 carbs............I run 32:1................what heat range plugs are you running? How much is shaved off the head? I build lots of the M50 Tohatsu's for racing..

[RWN50]

I PM'd you mate

[RWN50]

mercguy - I PM'd you but no response not sure if there is a problem with messages or not.

Can you tell me more about the M50's that you build? are you using stock fuel pumps still, a few guys a changing to 3cyl jetski ones. Do you always use standard 135 mains?

Im using NGK BR8HIX iridium plugs. heat rating of 8.

1.2mm off the head or nearly 50thou

What revs are you achieving out of your motors?

any advise would be great.

feels like its surging slightly with lower pitch props above 6800