I have a 2001 H380 with the 40hp engine. Just curious what kind of speed under power other H380 owners get and at what RPM setting. Even with a clean bottom I don't get the speed I thought I would compared to my old Legend 35.5 Thanks Brian C. S/V CREW REST
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Robert Pugh
Our 2001 380 does about 7.0-7.4 knots at 3000 rpm. This is better than last year when we changed out the two blade prop for a Campbell Sailor 3 blade. It makes a lot of difference in both power through the waves/swell as well a less vibration. And you use less fuel! There are many factors which will efect your speed. Most are self evidentand are beyond are control, e.g., wind, sea state, current. The prop is something you can control. I hope this helps.
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Bob Knott
My 380 does 6.5
My 99 H380 has the standard two blade prop and does 6.5 knots at 2800 RPM with a clean bottom. Never has been a fast boat under power, but for me that's fast enough and certainly faster than my old 280 went! Bob Knott H380
My 99 H380 has the standard two blade prop and does 6.5 knots at 2800 RPM with a clean bottom. Never has been a fast boat under power, but for me that's fast enough and certainly faster than my old 280 went! Bob Knott H380
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Bob F
Raise the main.
My 376 will do 6.5 @ 2800RPM. I don't like to run higher than 2800 for any length of time. Raising your main while you motorsail may help increase your speed. I have a 2 blade prop, but I am thinking about going to a 3 blade.
My 376 will do 6.5 @ 2800RPM. I don't like to run higher than 2800 for any length of time. Raising your main while you motorsail may help increase your speed. I have a 2 blade prop, but I am thinking about going to a 3 blade.
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Brian
Beginning to wonder
Well, I have a 3 blade prop that came with the boat, but I have never seen more than 6.5 kts under power (no sails up) even at higher than normal cruising rpm's (3200 or so). The engine will easily go to 3800 rpm in gear.. Maybe I am under propped?
Well, I have a 3 blade prop that came with the boat, but I have never seen more than 6.5 kts under power (no sails up) even at higher than normal cruising rpm's (3200 or so). The engine will easily go to 3800 rpm in gear.. Maybe I am under propped?
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Marty
2001 380
I have a 2001 380 and I get 6.5 @ 2500 / something over 7.0 at 3000. I use 6.5 @ 2500 as my feel-good reference. My speed is measured with a knot meter not GPS. I've calibrated my knot meter between 2 marks that I know the distance between so I think it's pretty close. A couple of things to think about. How are you measuring your speed? If knot meter, is your pin wheel clean? Last year I left mine in all season and it got dirty, wasn't spinning like it should, and was giving me much lower readings then I expected. I now take it out at the end of every weekend. Is it calibrated correctly? You said your hull is clean, but how about your prop? If your prop is covered with barnacles it's probably going to lose it's effectiveness. Marty
I have a 2001 380 and I get 6.5 @ 2500 / something over 7.0 at 3000. I use 6.5 @ 2500 as my feel-good reference. My speed is measured with a knot meter not GPS. I've calibrated my knot meter between 2 marks that I know the distance between so I think it's pretty close. A couple of things to think about. How are you measuring your speed? If knot meter, is your pin wheel clean? Last year I left mine in all season and it got dirty, wasn't spinning like it should, and was giving me much lower readings then I expected. I now take it out at the end of every weekend. Is it calibrated correctly? You said your hull is clean, but how about your prop? If your prop is covered with barnacles it's probably going to lose it's effectiveness. Marty
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Brian
Checked all of those
The indicated speed is calibrated properlyand I take into account varying wind/sea conditions. I first began to wonder when I took delivery of the boat a few days after it was splashed. (very clean bottom and prop ;-) A friend of mine also took delivery of a H340 and I ws having trouble keeping up under power unless I really pushed it up. Once we got out of the St. John's and got the sails up things changed and I left her. Thanks for all the responses. All things being equal, I think I am getting less knots per rpm than my other H380 owners. I am speculating that itis the prop.
The indicated speed is calibrated properlyand I take into account varying wind/sea conditions. I first began to wonder when I took delivery of the boat a few days after it was splashed. (very clean bottom and prop ;-) A friend of mine also took delivery of a H340 and I ws having trouble keeping up under power unless I really pushed it up. Once we got out of the St. John's and got the sails up things changed and I left her. Thanks for all the responses. All things being equal, I think I am getting less knots per rpm than my other H380 owners. I am speculating that itis the prop.
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Tony Wilcox
Sounds like the prop
If you check the Yanmar manual I believe the max RPM you should get is 34-3500 rpm. Higher pitch will probably help, also what size is the prop ? Tony
If you check the Yanmar manual I believe the max RPM you should get is 34-3500 rpm. Higher pitch will probably help, also what size is the prop ? Tony
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Brian Peyton
Check out the prop
You mention your engine will spin easily up to 3800 rpm while pushing your boat. If properly sized, pitched, etc, it should be hard to get your engine past the 3600 max continous rpm. Sounds like you need to swap props or get that one repitched.
You mention your engine will spin easily up to 3800 rpm while pushing your boat. If properly sized, pitched, etc, it should be hard to get your engine past the 3600 max continous rpm. Sounds like you need to swap props or get that one repitched.
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Jack Lott
Maxi prop on my 380
I had a feathering 3 blade maxi prop installed when I bought my 380. Easily does 7 knots at 3000 rpms. Never run engine faster than 3200, but think I could push it to 7.5 knots or better, but the added speed will take it's toll on fuel and engine life.
I had a feathering 3 blade maxi prop installed when I bought my 380. Easily does 7 knots at 3000 rpms. Never run engine faster than 3200, but think I could push it to 7.5 knots or better, but the added speed will take it's toll on fuel and engine life.
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