zen0414
New Member
Posts: 7
Jeanneau Model: NC 795
Yacht Name: Jesse’s Girl II
Home Port: Sandusky, ohio
Country: USA
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Post by zen0414 on Jul 23, 2022 17:12:09 GMT
We are enjoying our new 795 nc except for how loud the engine gets once we hit 4500 rpm’s or higher. It is almost painful to sit in the back. The engine seems to run fine and performance is similar to others who have posted in this forum. We are running the Yamaha reliance stainless steel 14m-14 1/2 prop. I don't see any sound deadening material in the cowling. Our previous boat had a Mercury 225hp Verado. It was much quieter.
Does anyone else notice this or have any suggestions besides ear plugs?
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zen0414
New Member
Posts: 7
Jeanneau Model: NC 795
Yacht Name: Jesse’s Girl II
Home Port: Sandusky, ohio
Country: USA
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Post by zen0414 on Jul 24, 2022 14:30:26 GMT
If you don’t notice noise, it would be great to know that too. That would let me know I have something unique or unusual going on.
Thank you.
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Post by fritz on Jul 10, 2023 15:55:15 GMT
Did you ever figure out if the noise level was normal? Mine is loud but recently it's become super loud over 4,500 RPM.
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zen0414
New Member
Posts: 7
Jeanneau Model: NC 795
Yacht Name: Jesse’s Girl II
Home Port: Sandusky, ohio
Country: USA
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Post by zen0414 on Aug 22, 2023 13:51:49 GMT
Hi Fritz, sorry for the delayed response. I’ve come to the conclusion that there is nothing wrong with the engine. It runs and performs on par with other stats I’ve seen in this forum. I believe it is probably more the design of the boat that lets the sound bounce off the back of the cabin and around stern area. I did install trim tabs, which has helped some because I can stay on plane at under 4500 rpm in most situations. I also came up with a “wind scoop” to pull air into the cabin thru the sunroof. This allows us to close the sliding door on hotter days. That works pretty well, especially on longer trips. I also tried a cowling cover with vents over the engine but that seemed to have minimal if any effect. I’m open to other ideas, but I think my best bet to keep trying to improve the wind scope.
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Post by fritz on Aug 22, 2023 18:32:20 GMT
I recently found a submerged log with my lower. This made me sensitive to the noise level before and after the repair. With a new lower 14.5" inch prop with a 13" pitch, I am sitting at 82 DB with the door closed at 4,800 RPM and 91 DB at 5,700 RPM. It still sounds louder than I remember, but it's probably just my ears.
The 14.5" inch prop with a 15" pitch recommended by the Yamaha dealer was too much for the F200 on the 795 series 1. The boat originally came with a 14.5" by 14" pitch which the Yamaha dealer felt wasn't right based on engine data.
First big trip post repair this weekend. Fingers crossed.
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zen0414
New Member
Posts: 7
Jeanneau Model: NC 795
Yacht Name: Jesse’s Girl II
Home Port: Sandusky, ohio
Country: USA
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Post by zen0414 on Aug 23, 2023 23:57:28 GMT
Hi Fritz, We spend time in Puget Sound and Friday Harbor on my son’s sailboat when he lived out there a few years back. Beautiful area. Best of luck and enjoy your trip.
I have have the 14.5 by 14 inch prop the Yamaha dealer didn’t think was right for the boat. It’s interesting the various props sizes Jeanneau used with the 200 hp Yamaha on this boat.
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Post by paulmcc on Aug 25, 2023 20:09:36 GMT
Hi. Do you have any details on that "wind scoop" you describe, maybe a photo? I agree the current design doesn't allow much airflow so have to travel with back doors open. Would be interested in similar modification.
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zen0414
New Member
Posts: 7
Jeanneau Model: NC 795
Yacht Name: Jesse’s Girl II
Home Port: Sandusky, ohio
Country: USA
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Post by zen0414 on Aug 31, 2023 14:40:20 GMT
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Post by paulmcc on Sept 13, 2023 20:11:43 GMT
Thanks for the photos, looks simple but effective. I'll try it.
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