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Post by Whiskers on Sept 11, 2007 15:37:49 GMT -6
Whiskers, what is the design operating rpm for that motor? On my 40 merc it is 5000-5500. What is your top rpm? I'm thinking maybe if 4000 is all she'll turn maybe your overproped. I think my 53 year old brain remembers that I'm running a 11 pitch prop. I turn in the low 5000 range. I usually run it around 4200 rpm. That seems to be the best for fuel economy/speed compromise. Trimming makes about 200 rpm difference. Not much really. Really stupid question now, you don't have some water in the pontoons do you? And for the joke question around here when someone is having performance problems, are you takin off the trailer when you put er in tha lake? LOL Have a good week! I don't know what the top end should be,I don't have a manual for it.On a real calm day if the water is smooth I can get about 5000rpm out of it but under normal conditions it will top out around 4500. I don't guess it's got water in the logs,it's been in the water since April and still floats at the same level.I wondered that myself in the begining but short of drilling a couple holes I wouldn't know how to check.I've never noticed any funny condensation marks on it when I had it on the trailer last winter/spring. If I had about another foot of clearance getting over the mudflat at the end of my cove I might try leaving the trailer on,that would be handy. Did you see the episode of Myth-Busters where they tried that? It slowed them down quite a bit but it worked.
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