1990 140hp johnson / 16' cape horn deep v
Do these pics look like this prop is slipping? The pictures are of a loaner from a local shop after running it saturday and sunday. My current prop is 15x17 and in rough water or when heavily loaded I'm maxing out at 5k but with a light load in flat water it planes out to 5500+. Shop guy loaned me this 15x15 (shop tuned measurements) to try out. The boat really seemed to like it at the lower RPMs but I got some really diminishing returns as it went up.
Running 4000rpm under a heavy load in ok water it went a steady 26mph, and turning 5600 WOT it bumped up to a max speed of 31mph. 40% increase in engine rpm only resulted in a 19% increase in speed.. something seems wrong there.
The balled up stuff on the forward side of the prop seems to be rubber from the hub.
Do these pics look like this prop is slipping? The pictures are of a loaner from a local shop after running it saturday and sunday. My current prop is 15x17 and in rough water or when heavily loaded I'm maxing out at 5k but with a light load in flat water it planes out to 5500+. Shop guy loaned me this 15x15 (shop tuned measurements) to try out. The boat really seemed to like it at the lower RPMs but I got some really diminishing returns as it went up.
Running 4000rpm under a heavy load in ok water it went a steady 26mph, and turning 5600 WOT it bumped up to a max speed of 31mph. 40% increase in engine rpm only resulted in a 19% increase in speed.. something seems wrong there.
The balled up stuff on the forward side of the prop seems to be rubber from the hub.
