I have a 3 year old Yamaha F2.5A that is refusing to start. Im stuck for finding the cause.
It's run rougher and rougher until now where it just does not start. The local mechanic
suggests the Yamaha carb cannot handle the local gasoline(
We are Bonaire
where the gasoline is from Venezuela) but everyone else here seems to be OK except for me.
I cleaned the carburetor with solvent and blew the 2 jets with clean compressed air, spark gap and spark are good. Compression
seems fine with some bounce-back, choke can engage and disngage, fuel filter
is not blocked and clean, tried 2 different fuel
sources here, I haven't touched the fuel
air mix as it requires a special tool. The carb gaskets look OK but I will replace them, and will check valves today.
One weird thing I found was sometimes there is a puff of escaping air from the intake manifold into the carb, not sure if that's normal?
Another thing it seems there was a little oil
above the piston (perhaps when the outboard
wasn't stored at quite the right orientation) .
When I cleaned the carb I accidentally bent the float valve and it was flooding, I didn't notice this for a while and it might have leaked into the oil
but only a tiny amount, the oil was changed when I started having problems.
Does anyone have any tips for checking an outboard
, anything that might lead me somewhere? STUCK!
Thanks, I would really appreciate any input, ideas or even musings!