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I don't have the comparison yet between motor HP, I will have to break in the new motors after transporting the boat to the marina tomorrow. The old 200 2-sroke engines worked just fine on this boat, they pushed it at WOT up to 46 mph. The old motors didn't have fuel flow analysis like the new 300's do, so I have very little data like I see on engines around here. The only reason I went to the new 300's was that those 200s were the original 1989 motors on the boat and showed 1500 hours. They were perfectly maintained and only exposed to fresh water, so I chose to sell them before running them in saltwater down here. This made the value of the motors stay as high as possible for the resale. They were sold without advertising them before I actually got them off the boat!

The new 300s 4-stroke engines at idle use 1.6 gph, or .8 gph each. I have not run them above aprox 900 rpm yet, as I have only tested them in a water tank at LMC. At 900 rpm, they were actually trying to escape the tank by pushing the forklift that was attached to the trailer backwards with the brakes locked! Those Rev 4 props have a lot of push power.

I also tested all the new electronics and everything works as it should, but I am still a bit confused about how the new battery system actually works. Each engine has 2 charging circuits, one for the starting battery and one for the house batteries. I have a C-Charles charging system in the boat, and I still need to work out the details of battery isolation and charging. This whole system gets complicated real quickly.

I plan on getting the boat in the water tomorrow, but it might be Tuesday. When I get some efficiency data with the new setup, I'll post a thread.