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Search took 0.00 seconds. Search: Posts Made By: Cheechako
Forum: Multihull Sailboats 29-04-2016, 13:10
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

I takes very little HP to move a boat at hull speed... in flat water anyway. Likely the reason many old boats have smaller diesels. They were more "auxiliary" engines then. Now, more people motor if...
Forum: Multihull Sailboats 29-04-2016, 12:09
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

In my cat I used to motor sail with the lee engine at low rpm. It made the boat point maybe 15 degrees higher and was really fast just loping along with almost undiscernable engine noise.!
Forum: Multihull Sailboats 29-04-2016, 10:43
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

Mine's better than yours... mine is traditional cotton string. :peace:
Forum: Multihull Sailboats 29-04-2016, 10:42
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

My 4-108 liked 2300-2400. That was the sweet spot. 44 Ft cutter. Of course it depends on the boat size and weight etc. You sound a bit low to me though.
Forum: Multihull Sailboats 19-04-2016, 16:47
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

Yeah, some boats are overpowered and some boats are underpowered. I assume small engine makers sell like a ~25 HP 3GM30 thinking you need the HP. So they recommend you run up at RPM where that HP is...
Forum: Multihull Sailboats 19-04-2016, 16:03
Replies: 60
Views: 15,978
Posted By Cheechako
Re: At what rpm to you cruise?

Yep, I usually run 2200-2500 depending on engine sweet spot. Cant deal with that 3600 rpm airplane noise. And incidentally, both Yanmars I ran at high rpm as they suggested failed prematurely....
Showing results 1 to 6 of 6

 
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