After fixing the leaks in the trim around the sponsons the next question is speed. With a 650 i dont expect to hit 50 but what can i do to boost the speed alittle bit. I have a custom three blade 18 pitch brass prop on the motor currently and on the last gun run i hit 43.1mph. Any ideas to hit 45?
I'm not sure how I would attempt this on an outboard, but on my Evinrude Playmate, my attempts to quiet the noise included adding a bilge blower to the intake which seems to act as a low grade supercharger. The boat definitely has a boost when the blower starts up. (I don't run it at low speed or idle. I is connected to a mercury switch on the spark advance)
You can run a 19p 3 blade to get around 45@5600. Jim S. was getting good speed with his 650. What was your rpm's? pic's? Guessing the brass prop is cupped perhaps, or not? Speeds being best imo with light wind chop..Mike Anfossi hit 45 with a Merc 500 but had a pad and special prop
My best speed with the Merc 650 on the G-3 was running a 3-blade brass, cupped, 21" pitch prop. I now have that prop on my Merc 1000 as that prop is listed for the Merc 1000 in the owners manuel for the 1969 Merc 1000.