![]() ![]() In 2017 my Yamaha was giving me endless grief by varying speeds that I couldn't cure. Cursing speed at the sweet spot of economy is now 28 mph at 3,600 RPM and the gas economy is only slightly more than the 4-cy. However, with a 19" big blade prop it's performance is spectacular. My stainless steel 17" prop was woefully inadequate for the power and even with a new 21" prop, RPMs were over the top of the WOT (wide open throttle). We also went through the I/O with new seals and water pump. Remove duplicates in garmin homeport mods#It took a couple of days and the only real mods we needed to make were front motor mounts. Well, in 2015 after talking about putting a bigger power plant in, Rick found a 1992 boat with a Merc V-6 LX and Alpha One, Gen II I/O so I bought it and we swapped engines and outdrives. I rebuilt the engine in 2001 which worked wonders for its performance. I put an oil reservoir on the I/O to monitor the oil and that is something I'd recommend to anyone with an I/O. Cruising speed was around 21 mph but with time and ethanol gas, dropped off to around 19 mph. That's a small engine for the boat but it sure was economical to run. ![]() The power train was a 3-Liter (130 hp) Mercruiser with an Alpha One outdrive. ![]() It's named " Cooler By The Lake" because that's our usual summer forecast in our home port of Marquette and being on Lake Superior. My boat is a 1988, 22' Sea Nymph with an aluminum hull and cuddy cab. Below is a description of my boat and equipment: ![]()
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