Sound baffling for the motor

[kurz]

Use earplugs...

[NiceAft]

Kurz,

I always thought of you as an exemplary example of Swiss culture; polite, disciplined, and reserved.

Use earplugs...

Now I’m not certain.

You’re just like everyone else.

[fredthorne]

For what it’s worth, aboard Courageous (26X) on longer trips under power I’ve found good luck diminishing engine noise by wearing my Apple AirPods (the ones with noise cancellation), I can also enjoy my sailing playlist at the same time. This summer I’m considering setting my AirPods for “walking-talkie” mode, so my First Mate & I may communicate.

[sunshinecoasting]

I have a 2000 model Nissan 50 2 stroke and although it is noisier than I want it to be I just don't get the noise that you guys are getting? At 5-6knots I can still easily have a civil conversation from the captains seat, maybe the BF50 is just a loud motor?? I dunno, I'm more interested in getting rid of some fumes in the cockpit, opening the front hatch helps but at low speed I still get them.

[Be Free]

The BF50 is not a loud engine. At idle I can't hear it at all just a few feet away. It has a quiet hum up to about half throttle. Even at full throttle it is not uncomfortable. It does not get loud enough to begin to interfere with conversation until about 3/4 throttle. That is why I think the OP's problem is an engine that is revving higher that necessary for the speed he's doing.

[NiceAft]

It’s hard to discern what is too loud. One captain’s LOUD, might be another’s purrr.

Totally agree with this from Be Free.

The BF50 is not a loud engine. At idle I can't hear it at all just a few feet away. It has a quiet hum up to about half throttle. Even at full throttle it is not uncomfortable. It does not get loud enough to begin to interfere with conversation until about 3/4 throttle.

[DaveC426913]

The BF50 is not a loud engine. At idle I can't hear it at all just a few feet away.

Yeah. It's pretty quiet at idle.

That is why I think the OP's problem is an engine that is revving higher that necessary for the speed he's doing.

Surely that would be apparent in a less-than-optimal top-speed.

If my engine is revving higher than normal for a given speed, the corollary is that, at top revs, my top speed will be significatly lower than it should.

I've had it up to 13.5 knots, though nowdays I top out at about 11.5 knots. (The throttle hits the pedestal before it can max out. Don't know how much higher it can go.)

[Be Free]

I would say that a loss of around 15% in your previous top speed should count as being significantly lower. Has something else changed that would account for the loss?

Even your original 13.5 knots at full throttle is lower than I would expect. As I stated earlier, I would consider my boat to be extremely heavy by most standards and I'm running 16 knots at full throttle with 10 less HP. You should theoretically be almost
2 knots faster than me.

You said that your "throttle hits the pedestal before it can max out". Every factory install of the Honda on an X (that I've seen) have the throttle mounted on the starboard side of the pedestal and rotated aft 90 degrees. Is yours different?

[DaveC426913]

I would say that a loss of around 15% in your previous top speed should count as being significantly lower. Has something else changed that would account for the loss?

Not sure I'd trust my testing technique, really.

You said that your "throttle hits the pedestal before it can max out". Every factory install of the Honda on an X (that I've seen) have the throttle mounted on the starboard side of the pedestal and rotated aft 90 degrees. Is yours different?

Pretty sure mine is standard, yeah. Neutral is horizontal. It hits the pedestal bar at maybe ten degrees forward of vertical.
Is a pedestal-mounted table standard? Maybe my pedestal yoke is wider than stock?

Can't find good pix online. Here's the best I found:



(In a way, I'm kinda glad it doesn't go higher; it's so loud I fear it's gonna just blow up.)

[mac n cheese]

(In a way, I'm kinda glad it doesn't go higher; it's so loud I fear it's gonna just blow up.)

Not sure why the installer of your remote control did not rig it so that you could achieve W.O.T. I'd want to know how fast I can go. It's achievable...but it does take some effort to center it in order for it to not hit the helm wheel and helm bar. Remote in pic is from my BF50D using aluminum U channel and kitchen
cutting board. I'm rarely at W.O.T. for more than a few seconds anyhow and yes I agree it is loud and the engine feels a bit stressed pushing that barge at wide open throttle.

[DaveC426913]

Not sure why the installer of your remote control did not rig it

Ah. Well. Yours is opposite mine.

My raise/lower button is on the outside, and there's only a 1/2 inch spacer in there.



Also, my wheel is wrapped in black (the white wrap turned grey real fast), so there's that...

[mac n cheese]

Not sure why the installer of your remote control did not rig it

Ah. Well. Yours is opposite mine.

My raise/lower button is on the outside, and there's only a 1/2 inch spacer in there.



Also, my wheel is wrapped in black (the white wrap turned grey real fast), so there's that...

You've got some good photoshop skills. Trim button "should" be on the inside as intended IMO. If installed and rigged to the outside
as your yours is and I'm sure others here too, don't you find it gets bumped when walking by and the motor is trimming up and down accidently?
Having said that its not perfect on mine as I can't get my thumb on the trim button at high power settings due to interference with the helm.
Pushing the stick forward and the boat accelerates forward is all that matters in the end.

[Be Free]

The handle on the Honda remote control is reversible so either way is "correct". I've done mine both ways and found fewer issues with it installed the way Dave's is installed (even though I have bumped the trim button by accident just as you surmised).

No matter which way it is mounted, the handle does not project beyond the opposite edge of the remote control. I'm confused as to what you are hitting. There should be a plastic spacer the same shape as the remote box positioned between the pedestal and the remote control.

Full throttle on my remote (and on the one before) is approximately 90 degrees forward on the control. The full throw in reverse is about 80 degrees.

It sure would be nice if you had a working tachometer...

[Brerif]

Use earplugs...

It would be cool if it helped fix the breakdown)

[1st Sail]

I had the tools so I built a transom filler board from a Sam's Club hdpe cutting board. Same material as starboard less the uv inhibitor. Under the seat it gets little UV exposure so I'm 6yrs in and no deterioration. For the price make two. If not I would buy the BWYachts transom filler board. It reduces the noise some and definitely blocks exhaust in a following wind. My Etec 50 is definitely not a quiet motor. Perhaps one of the louder outboards. At higher rpm it is what it is.

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