1986 Mariner/ Yamaha Made 9.9 2 stroke bogs at around 4500rpm momentarily
I have rebuilt the carb but not the fuel pump.
The primer bulb seems fine and not soft at all.
it doesn't seem to bog all the time but if I hold it at WOT it happens then goes away, might happen again for a sec or 2 then go away. Then it might be find and I can keep going.
I don't think it's ignition because after a while it runs smooth.