Are Suzuki 50 HP Motors Unusually Loud?

gljjr · Posted: Mon Jun 19, 2006 11:39 am Post subject:

If would seem to me that something similar to what Ray Macke did on his cabin skiff is what you guys need.

BTW: If you haven't read his website about building it I think you will find it very interesting. http://www.egyptian.net/~raymacke/index.html

Byrdman · Posted: Mon Jun 19, 2006 3:06 pm Post subject:

Yea.... kinda what Ray did... Thanks.. Thumbs Up

......

don't ya know I'll always be truuuuua. Note

Thanks Don. I needed that flashback. CoolSmile

Byrdman

Byrdman · Posted: Mon Jun 19, 2006 3:39 pm Post subject:

Gary... great link. This Ray guy should be a C-Dory owner for sure. Thanks for the link.

Byrdman

gljjr · Posted: Mon Jun 19, 2006 4:12 pm Post subject:

Yeah, I thought the same thing Pat!

His engine cowl is functional but I think I would change it to make it more useful by getting rid of the angle on the front and just go straight up to make room for a fish cleaning station/table area.

Or incorporate a cooler mount along with the cowling. Although that might be putting too much weight up high.

Norm S · Posted: Mon Jun 19, 2006 4:28 pm Post subject:

Patrick, I'm not sure how high your new motor will be but my Etec is low enough that the table top could be just about level with the top of the motor well. It would need to be hinged to allow the motor to tilt up but that may be even less of a factor with the 12" jackplate you are putting on.
Norm

gljjr · Posted: Mon Jun 19, 2006 4:59 pm Post subject:

Here is a picture from the Arima website showing their table that goes over the splashwell.

Byrdman · Posted: Tue Jun 20, 2006 11:12 am Post subject:

You are target on with the height Norm.... To the point that after looking at some of the stearing cable issues with manual stearing.... that I am forgoing the jackplate at this time... Gonna put her in the water and run her a bit ....and just use her for a while and adjust fire from there... she is shinny now... will post newest pic on C-Byrd thread.

Yes... that looks like a nice set up back there. Good point about too much weight getting too high...and it has been a while since I have spent a lot of time on a mono hull.... got some oh yeah stuff to work back thru....that can only happen on the boat, in the water, in all the differant circumstances that occur.

Byrdman

oldgrowth · Posted: Wed Jun 21, 2006 12:38 am Post subject:

I just received my Quitecar paint. It is really a paste. I have decided the only way to give it a true test is to :
Build a water tank for the engine so I can run it on the back of the boat on land while stopped.
That way I will not have any wind or water noise influencing the results.
I will run the engine at different RPM’s and get noise readings at different points on the boat using a db meter.
I will then paint the inside of the engine cover and repeat the test.
I will then apply a second coating and repeat the test.
I will then do the same after a third coating. (supposedly three coatings give the maximum noise reduction)
I will post the results here at the conclusion of the test.
Don’t hold your breath waiting for the results. I start haying tomorrow and do not expect to finish until Saturday or Sunday. I then may take a few days off and go cruising on Hood Canal so it may be after the first of July before I have completed my test.

I hope it makes a significant difference.

Blueback · Posted: Wed Jun 21, 2006 12:45 am Post subject:

Hay{sic} Oldgrowth,
Glad to hear your going to run a test with a db meter and the sonic control paint. If it works you will get a Gold Star for research
Blue

oldgrowth · Posted: Wed Jun 21, 2006 2:36 am Post subject:

We could talk about it until the cows come home and never accomplish anything or I could spend $125 to $150 and try something. If it helps it will be worth it, if it does not, I have blown more than that on dumber things. Besides it’s the challenge as much as anything else.

dogon dory · Posted: Wed Jun 21, 2006 10:16 am Post subject:

Sorry, Folks - Post Deleted By Author

gljjr · Posted: Wed Jun 21, 2006 12:22 pm Post subject:

DOD, how well does putting your Cooler on the transom work to cut the noise? Seems to me that should make a big difference!

dogon dory · Posted: Wed Jun 21, 2006 10:26 pm Post subject:

Sorry, Folks - Post Deleted By Author

oldgrowth · Posted: Mon Jul 03, 2006 1:30 am Post subject:

Well; it took longer to do my haying than expected and I started later than I had planned. I just finished it yesterday (Saturday). I managed to catch my tractor on fire (where is DaveS when you need him). No real damage except to the wiring and the ends of my fingers putting it out.

As I said in the post, six above here, I would test the Quitecar paint on my Honda outboard. I bought a sound meter and measured the decibels in my boat for a reference point.

Some things I found out in my initial test.

Taking a reading from between the seats in the cabin, I get a higher db reading at lower rpm’s when I point the microphone towards the bow than I get with it pointing towards the engine. When the engine rpm is 3500 or higher, the db reading is higher with the microphone pointed towards the engine. I could not run my engine above 4000 rpm because it would kick too much water out from the tank.

I also took readings at 1’ - 3’ - 6’ & 9’ from the engine. 6’ would be between the seats and 9’ would be just inside the v-berth. The readings at 9’ had a db reading as high as those at 1’. The lowest was at 3’ which would be the middle of the deck behind the cabin.

I then painted the inside of my engine cover and ran most test again.

I didn’t get much of a reduction in my readings at any point. The readings ranged from the same to a reduction of 3 db except at 1500 rpm where I actually got a higher reading after applying the paint. The first coat I applied was too thin so that could be the reason for so little of a reduction.

Since the initial test I decided to apply three good coats and retest. It is drying now and I will retest on the 4th. After the test I will report the preliminary results here, then when I get time I will post the readings for all the test

dogon dory · Posted: Tue Jul 04, 2006 12:58 am Post subject:

Sorry, Folks - Post Deleted By Author