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Old 07-26-2019, 01:47 PM   #13
Senior Member
City: Qualicum Beach, Vancouver Island
Country: Canada
Vessel Name: Capricorn
Vessel Model: Mariner 29 - Express Cruiser 1969
Join Date: Feb 2019
Posts: 413
The new merc engines aren't automotive engines marinized, they have been designed from the ground up for boating and built in Wisconsin. I called a Prop guy in Everette Washington and he said his Merc chart for B3's stopped at around 9000 lbs. I was told the boat would actually go slower with a B3 than a B2 as the B2 can handle the extra weight whereas the B3 with my boat would have been a crap shoot as to whether it was capable or not.

The torque on the new engines is suppose to be a lot smoother from ideal to WOT.
rsn48 is offline   Reply With Quote