Prop for 23 SeaCraft with transom-mounted Merc 250 EFI

[joshmon71]

i have a 17p mirage plus getting dusty once i put on a 17p rev4 never went back. probably could have gone higher in height. the 17P blew out on hard turns. i lost 2-3mph and 200-300 rpm i think but don't have hard numbers at hand. wot speed less worried about than making sure engine can get into its proper wot rpm's. i can spin to 6k/6100 rpm heavy loaded trimmed up and more light load. 6400 is max. verado 275, 650lb motor. t-top.

looks like next winter I need to think about a pilot house for another major project. i've never ever seen over 42/43 light load.

have a new (to me its a 2020 merc 300) engine this season so prob go to a 18p rev4. that highfive though is interesting....hmmmm.....i like the stern lift of the rev 4.

Bigshrimpin How is the high 5 prop running in seas east of the cape / offshore compared to rev4? planes out about same speed?

that is one sweet pilot house Bigshrimpin! wowza! is that a seamark? they are out of business now? went looking around for them a few years back came up blank.

[rdoaner123]

I should mention, I've been noticing the prop sometimes partially breaks free even when I'm going in a straight line and increase rpms. The prop shaft seems straight, so I'm not sure why this would be

Attached is a picture of the lower unit with slightly positive trim at 3600rpm. I circled the back of the anti-ventilation plate in red. You can barely see it through the water. Should I go up one hole or two?