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Merc 150
On a 2003 210CC hull, I have a Merc 150 (Saltwater series, carbureted). RPM range is supposed to be 5000-5500 according to my mechanic, but 5100-5600 according to the owner's manual.
I was running about the same with both the aluminum 14.5 x 17 prop that came with it and the 14.25 x 17 Michigan Wheel Ballistic prop I was running:
top speed around 38-42 mph (about 40 most of the time)
4800-5100 rpm (about 5000 most of the time)
I just got a new prop (the Ballistic was stolen out of my backyard - now I'm using my "The Club" type of lock religiously again) - the prop is a Michigan Wheel Rapture 14.25 x 15. I only took it out once so far (yesterday):
top speed 40 mph (w/ 2 200lb persons and half a tank of gas)
hit 5400 rpm but sometimes the tach was showing about 5100 and still hitting 40 (think my tach isn't reliably accurate - though maybe it's because the tach never saw 5400 in 4 years until now)
Acceleration seems better than before. Top speed is about the same - hopefully at least my full load (4-5 person) top speed will be a little better than before. I'm probaby keeping this 15 pitch prop - mainly because I think my top speed rpm's are better for the motor now than before (where it barely hit the low end). Still wondering if there's a lot of water in my hull, but none comes out of the transducer mount (but I'm wondering if foam is blocking the water)...
If anyone else out there has a Merc 150 on a 210, please post your experience (year of boat, model and size of prop, top speed rpm, top speed). Thx.
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