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Topic Title: 35' Searover speed
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Created On: 08/23/2011 08:21:38 AM

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09/16/2011 10:56:56 AM
stmbtwle Admiral Posts: 2142 Joined: 04/22/2003	A large prop grabs more water and has a bigger bite. Sorta like 4-wheel drive vs 2-wheel. You need all the "traction" you can get to push a houseboat. Pitch is your "gear"... Low pitch, low gear; high pitch, high gear. For a houseboat you need a low pitch or you may overload the engine. Water being a fluid you can trade-off one for the other a LITTLE, but the prop for a runabout is not going to be suitable for a houseboat. Will it work? Maybe. Will it work well? NO. Serious prop-shops have computer programs that given the right data will pick close to the optimum prop for you... can you BUY that prop? maybe... or maybe you'll have to get the closest one and have it tweaked. ------------------------- Willie She's a tired old barge but she's paid for! http://s71.photobucket.com/alb...p;current=ef324993.pbw
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11/07/2011 06:52:27 AM
Searover Member Posts: 35 Joined: 08/10/2011	Well got about 6 hours of run time this weekend and I am happy with the speed and power of my boat. Like most know I am rebuilding a 35' Sea Rover and installed a 3.0 Mercruiser. The boat handles really well at the dock but that is a lot to do with the prop. I am 100% for the propco prop. It is very strong in reverse. I only have one engine so the prop really helps with docking. The boat will run 5.1 mph at 900 rpm, 7.5-8.2 at 2500 (changes with wind and current), and wide open 4200 rpm the boat top at 9.3 mph (ran 9 mph going against the wind and current). Does most house boats push so much water? When I am running 2500 rpm which is the speed I will run most of the time I am pushing a wall of water and making some 1-2 waves. My boat is sitting almost level.
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11/07/2011 08:04:16 AM
EastTNBoater Admiral Posts: 226 Joined: 11/27/2002	Some of those boats that size push a ton of water. You need to play around with the speeds to see what works best for your situation. Suprisingly, my 18x80 ft houseboat makes less wake than my 14x72. I suppose it has to do with the overall displacement.
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11/07/2011 04:05:09 PM
stmbtwle Admiral Posts: 2142 Joined: 04/22/2003	Searover you might back off on the throttle a bit and settle for a slower speed. It takes power/gas/MONEY to make those big waves. A half-knot less and the wake and the fuel consumption will be noticeably less. How often have you seen some speedboat running with his bow in the air and dragging a big wake? You're doing the same thing only you don't have the power to push the bow up into the air. Length has a lot to do with the wake at a given speed. Long hulls can go faster with the same horsepower than shorter hulls, if the hull form and displacement isn't way out of line. In the 50's they used to cut old WW2 tankers in half and add a section for more cargo capacity. The lengthened, heavier ships actually went FASTER with the same engine. ------------------------- Willie She's a tired old barge but she's paid for! http://s71.photobucket.com/alb...p;current=ef324993.pbw
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FORUMS : Houseboating : 35' Searover speed

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