problem with merc

[Snowking]

heres the skinny
bought a new 16' fisher last year. First mistake, had a 50 horse 4-stroke carbed on it. was recalled do to valve problem i think? was replaced with a 50 horse 4-stroke EFI. now i cant pull a many rpm 5100 tops compared to 5700 with the first motor. same prop is being used. could this be a linkage problem? the reason i ask is that it shifts into gear right away but then a big dead spots till the throttle hit about the 10 o'clock position? any thoughts? thanks Snowking

[Guest]

The max rpm of that motor is 5500, to 6000, so I would guess it is the prop, or the throttle adjustment.
The shift, and throttle adjustments are completely different adjustments in the motor.
I would take off the motor cover and see how the throttle linkage is reacting while you have someone else move the throttle. If it's not moving all the way, or not starting to move right after the motor goes in gear, it's an easy adjustment.
I would highly recommend getting the repair manual for the motor. It explains all adjustments, and repairs in good detail.

[workingfisherman]

what years are they recalling is it the merc
power head or the yamaha.mine is a 1999.yam