Hi folks,
My 503 DCDI just surprised me. 300 TT. 0 since top OVHL. Earlier today, it ran for an hour like a sewing machine. Smooth as could be. Five hours later, when performing a pre-flight run up, it is breaking up at high RPM's. Not much changed, except the ambient air temp cooled a few degrees, I added more 91 octane fuel & oil pre-mix (at 40 to 1), from the same Shell station to the tank. Post mortem: Pulled the plugs .... a little black but not more than expected.
What changed!?! :evil:
Where to begin?
Thanks for ideas and suggestions.
john
My 503 DCDI just surprised me. 300 TT. 0 since top OVHL. Earlier today, it ran for an hour like a sewing machine. Smooth as could be. Five hours later, when performing a pre-flight run up, it is breaking up at high RPM's. Not much changed, except the ambient air temp cooled a few degrees, I added more 91 octane fuel & oil pre-mix (at 40 to 1), from the same Shell station to the tank. Post mortem: Pulled the plugs .... a little black but not more than expected.
What changed!?! :evil:
Where to begin?
Thanks for ideas and suggestions.
john
