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Old 15 September 2005, 18:18   #31
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Country: UK - England
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Quote:
Originally Posted by Mollulnan
I agree Burdick, some of the guys on this site do appear to wring a lot more top speed out of their similar rigs than I manage. 41 is tops for me. Let's hope that speed, like size, isn't everything. Not saying that I'm small, Oh no!! Honest.
is 23 stone quite small then down in cornwall?
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Old 15 September 2005, 18:21   #32
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Quote:
Originally Posted by Burdick
Wish I could get over 40 knots out of my DF140. 35/36 knots is all I can acheive with 21" ali prop at 5300 revs on a very good day. I accept my boat is bigger and heavier but a chum of mine has an identical boat and set up and he will get over 40 knots out of his. Engine in for a 190 hr service today so will see if that helps.
one thing might be to look at is the travel on the throttle and make sure it is opening the throttle fully on your boat, poorly set up controls can cause all sorts of issues
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Old 15 September 2005, 18:23   #33
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Also consider that they are two different hulls?

Or is your prop too small and you're reaching maximum revs too early?
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Old 15 September 2005, 18:27   #34
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the way they make a yam 15 a yam 10 is have the throttle open up just over half way and have reeds that only open up about a half way compared toa reed block on a 15

so have a butchers ar your controls and make sure you are getting full travel

also as richard says if you reach max revs and top end is down then you could go up on the prop, check your friends prop and if coarser you might have it
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