"Hello all. I'm a long-ti
"Hello all. I'm a long-time lurker and first time poster.
hopefully I can get some help as i am in quite a bind. I just spent a bunch of money on two new propellers and they seem to have slowed my boat down by about 10 knots. I am currently running twin v6 4.3 liter mercruisers to bravo 2's.
My local propeller shop told me my current propellers were 18.25" by 19 degree pitch and were unrepairable. He said I should achieve 250 more rpms for every deg. of pitch I go down....(I was full throttle max at about 4200 rpm) so, he set me up with a 18.75" 17 degree pitch propeller. these props are cupped as my last ones were (im not sure as to how much cup variance though ..make a difference?)They are also alluminum as my last ones. I should have achieved higher rpms but I am revving the same if not a bit less than before and my boat is sluggish as all hell!!
Please someone help!"
"Hello all. I'm a long-time lurker and first time poster.
hopefully I can get some help as i am in quite a bind. I just spent a bunch of money on two new propellers and they seem to have slowed my boat down by about 10 knots. I am currently running twin v6 4.3 liter mercruisers to bravo 2's.
My local propeller shop told me my current propellers were 18.25" by 19 degree pitch and were unrepairable. He said I should achieve 250 more rpms for every deg. of pitch I go down....(I was full throttle max at about 4200 rpm) so, he set me up with a 18.75" 17 degree pitch propeller. these props are cupped as my last ones were (im not sure as to how much cup variance though ..make a difference?)They are also alluminum as my last ones. I should have achieved higher rpms but I am revving the same if not a bit less than before and my boat is sluggish as all hell!!
Please someone help!"