low rpm's

[senior79]

just put new F70 Yamaha on tracker tournament pro 18 it has a stiletto 13.5x15 ss prop can only turn 5200 rpm dealer purchased from says that is ok but maybe raise motor 1 hole already close to 1 inch above bottom of boat but should not go to lower pitch on prop was suggested by another dealer to go to turbo 14x13 pontoon 1 Need to know which way to go?

[99yam40]

ask if they will let you try it and bring it back if not what you want or need

[boscoe99]

Way too low on WOT RPM.

That motor has a redline of 6300 RPM. You are below the minimum recommended WOT RPM. Show the dealer your owner's manual.

Once the engine height is established for best performance select a propeller that will let the motor turn at or near 6300 when the boat has at least a normal load.

[rodbolt17]

find a dealership with a Yamaha master tech.
not a hull dealership.
way way to low on the RPM.
way way to large on the prop.
dealership should have done a proper PDI and you should have signed it.