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			| Steplift 72' | 03-04-2009 07:49 PM |  
 
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					Originally Posted by steplift20
					(Post 137187)
				 im turning a 15x17 prop it runs reel well and with the weight i carry it s probably doing what it should do78 steplift thats the one to own we should start our own club what do you think? how many 78 s are out there
 I used to turn a 13 1/4 x 19 inch s.s. prop wasnt happy with that then was told to turn a 15x17 on this web site perfect size im happy with the r4esults
 
 |  I recall the 83' Mercury Boathouse Bulletin for the V20, the 150 did 46 mph with a very light load and a 19" prop. I ran a 17" SSTII prop with a Johnson 150 and also got about 46 mph trimmed out, but turning almost 6000 rpm as I recall. In real life with full tanks (72 gallons), several ice chests, 4 guys, a 25 hp kicker, and lots of tackle the propping was right and cruised well. Botom line is that top end isn't the "end all". Real life means cruising where the motor won't be in such a load that it burns pistons and cylinders. Folks that have bottom paint on their planing hull boats need to be happy with 2-3 less mph and sacrafice some MPG also. I see lots of pictures of trailable boats with bottom paint, it's a killer on performance and MPG IMO. |