bob johnson
Rear Admiral
- Joined
- Feb 25, 2009
- Messages
- 4,304
I have a Lowe roughneck 12 degree Mod V...I had a 115 ocean runner on it and even with level flotation pods( meaning some drag!!) I still got about 38 MPH with a 12.75 X 15 aluminum prop. well that motor blew and I tore the boat apart because the foam absorbed so much water, and I installed a 1999 150 hp Johnson. I removed the center console and built a small side console and installed it on the front deck.... the motor ran great when I bought it. It was a long shaft so I pulled the power head and put it on a 1997 175 hp faststrike midsection. That mid section was wearing a 15 X 19 pitch aluminum prop in good shape. yesterday I took the boat out for some trial runs... and I only got up to about 35 mph at 5000 rpm.....WOT. the boat weighs right at 2000 lbs rigged and me and a friend were in it for an extra 360 lbs plus a 65 lb lab..... so am I close? I have a SS and an aluminum 15 X17 prop to try....but I am thinking ill only get up to about 5200- 5300 maybe with that pitch... I would have though I could run easily into the 40s at 5000 rpm... with a Big V6.... as the boat sits now the flotation pods are off.....I am wanting to get a baseline of WOT before I reinstall the pods...... Id hate to think I need to go down to a 15 pitch to wind this outboard up enough to get to 5600-5700 rpm.... WOT....which is where id like to set this motor up at.....thinking ill seldom run that RPM, because the boat is a duck hunting rig. does anyone think the motor isn't running up to snuff... compression was 90 psi even all 6 cylinders... I think I checked spark before I bought it... would it wind to 5K rpm on 5 cylinders???
heres a photo when I pulled out of the river last night
thanks
bob
heres a photo when I pulled out of the river last night
thanks
bob