I upgraded my 40 Honda last summer with a 60 Merc EFI 4 stroke bigfoot on my 17' pontoon. I had only been able to put about 4 hours on it before putting it into winter storage. I have two concerns on the Merc. When I rev it up out of gear it is smooth as silk. When in gear at speed I get vibration in the boat I never had with the Honda. This is a new motor and prop. Is this just something normal with the bigger lower unit and prop with the Bigfoot or might there be a problem? Also when I power down the motor toward idle it does sort of a "ringing" sound at 1500 rpm.
Any input would be appreciated.
Rick
Any input would be appreciated.
Rick