1801 prop size

My bottom painted 1801 with f115 Yamaha wearing 3-13 1/4 19 (19k ss) prop gets only 5100 wot and making about 33mph by gps. Yamaha performance bulletin used this prop in their test in 2006. I think the engine would be happier with 17k prop(less logging). I just changed the oil and it is high and smells like gas. Just trying to eliminate one of the reasons for oil dilution by gas and extent the life of this engine. That prop do you use on your 1801- F115 combo?
Mike

Sorry. I guess I pose a hell of a question. :roll: or everyone is busy boating.
Mike

Mike I just haven't been to the boat to check.... But will do so as soon as I can.

Thank you!