37 X_Dimension
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04-16-2007, 04:05 PM
#12
Charter Member # 55
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I believe to get the actual X dimension, you add 9.25 inches from the measurement below the transom assembly to the bottom.
I know on a single, you measure to the bottom of the V. Not sure if that how you should measure it is well for twins.
I know on a single, you measure to the bottom of the V. Not sure if that how you should measure it is well for twins.
04-16-2007, 04:47 PM
#14
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Trim is the same. I have two sets of props 30 & 32. I use the 30's for topend get a little more out of them, 90mph and the 32's for long distance cruising, get about 5 mph at the same rpm, top end loses a little 87.5 . Cruise at 3000rpm at about 45-46 mph. Fuel mileage 1.5 mpg
04-16-2007, 04:50 PM
#15
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I did try Rich's 1 1/2 inch spacer's, they were great out of the hole shot NO SLIP but lost some cruise and top end. Went back to the 1 inch. I think they work the best.
04-16-2007, 07:06 PM
#16
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Drive height/X-dimension
Bobby Moore instructed me on drive height/x-dimension...His suggestion was to use a long straight edge on the hull, say a 4' or 6' level and hold it up on the hull; run it straight past the lower unit with the drive in a level or neutral position...measure from that line down to the center of the propshaft. This dimension should be between 4" & 6" for a 75-90 mph deep "v". Step hull could change this number slightly. Just what I was told; maybe this will be helpful....of course the best lessons are the one's learned thru trial & error! LOL
04-16-2007, 07:09 PM
#17
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Bobby Moore instructed me on drive height/x-dimension...His suggestion was to use a long straight edge on the hull, say a 4' or 6' level and hold it up on the hull; run it straight past the lower unit with the drive in a level or neutral position...measure from that line down to the center of the propshaft. This dimension should be between 4" & 6" for a 75-90 mph deep "v". Step hull could change this number slightly. Just what I was told; maybe this will be helpful....of course the best lessons are the one's learned thru trial & error! LOL
04-16-2007, 07:53 PM
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Well my boat had 1-1/2" spacers when I got it. When I spoke to previous owner and told him I planned to take the spacers out he said"don't even try it" boat was blowing out and once on plane would porpoise out of control. Could be cause it's a twin 28...so I left them in after talking to Bobby Moore...x-dim. is 5.5" right now.
