ok

headgsket was changed last week


been out now and used QTR tank of petrol, and haven't used any water.

but

the temp's rise from 82 to 86ish when on full throttle, but come straight back down when not ful throttle

my spa gauge tells me this which is in the front water housing

the temp STD temp gauge dont move.


any ideas????

airlock????

headgasket??? ( butr surely id' be using water)