10 Meter Underwater Exhaust

[bajasurvey]

Am a new owner of a 1984 10 Meter and have never had a boat with side (underwater) exhausts. At certain speeds notice that some exhaust smell can suck back toward the cockpit and am curious if others have seen this and whether they are happy with this arrangement. My boat has a full bimini and cockpit awning and this may contribute.

[Wes]

We a 1983 flybridge aft/cabin and I've never noticed that.

Wes

[prowlersfish]

I have the same issue with my F36 with rear exhust . the side exhust where supost to lessen the effect . with the windows open on my top open it is not as bad . this is a common complant on many boats of all makes .

[RWS]

I have a 10 meter cruiser.
Prior to the repower there were conditions that would produce the station wagon effect, especially a following wind.

This could be decreased by leaving the forward hatches open and the sliding door open.

Interestingly, after the repower, this occasional situation absolutely, totally and completely disappeared.

I believe it may have something to do with the vessels improved running attitude. The diesels and larger props create more lift, her a$$ gets up and out of the water and there has been zero station wagon effect whatsoever since the refit.

RWS

[prowlersfish]

I wish I could say that . if open the sliding door it would fill the cabin with diesel fumes I will have to try it with the hatch open .

[bajasurvey]

Hey RWS thanks for the tip on the hatches, will try anything to keep my wife from getting queasy. At least the amazing beam virtually eliminates rolling (I have owned 5 sailboats). Also reviewed your amazing renovation with the twin Yanmars, gorgeous.

Another question, were hot water heaters standard on the 10M?

[my10meter]

Congrats on the new boat-- I am also the steward of a '85 10 mtr express last fall--believe me--after having a 28 bertram for 25yrs-- I can relate to the relief of a stable platform.
The hot water heater is forward of the port engine in my 10mtr express.

I will be splashing in 35 days-- still going thru the to do list-- slowly but surely.

For those who have been waiting-I will be posting more detailed pictures of the custom L shape and teak interior soon.

[foofer b]

I believe most all boats do this to a degree. My f26 actually set off the CO detector in the cabin one day!!

I really feel for ya'll northern boaters. Must be tough to be drydocked all winter. Last Saturday, we scuba'd 10 miles off St. Augustine. It was a gorgeous day, 75 and sunny with barely a breeze! The water was could tho- only 65!!

[ready123]

I believe most all boats do this to a degree. My f26 actually set off the CO detector in the cabin one day!!

On my F32 we have to keep salon doors shut and the front windshield vent open to make the cat happy (or any human who may be below) in the salon while underway.

I really feel for ya'll northern boaters. Must be tough to be drydocked all winter. Last Saturday, we scuba'd 10 miles off St. Augustine. It was a gorgeous day, 75 and sunny with barely a breeze! The water was could tho- only 65!!

It's not just in the winter that the water is cold up here... I remember diving in Tobermory (Dave's Bay) one sunny summer day while experiencing upwelling which made the water temp drop to about 35 at depth causing us to abort due to that feeling of an axe to the top of the head, drysuits kept the rest of the body warm but the neoprene hood just did not cut it. Now that's cold water!

[foofer b]

Holy toledo, 35 degrees!! Talk aboput your regulator icing up. We whine in the winter when we "brave" 60 degree water. Fortunately we can always get our fix at any of the springs nearby, at 72 degrees year round. I know what you mean by the axe to the top of the head- it's kinda like an ice cream headache/brainfreeze from the outside in.

[prowlersfish]

A least you guys are hot or cold and stay that way . it was in the teens 2 weeks ago and snowed , 80 last weekend and in the upper 30s today . you get ready for warm weather then you get a snow storm .

[TC]

Ready 123

Yes I remember diving in Tobermory and going thru the thermcline at about 25 feet and the temp was 34'F. It was late July. You could actually feel the tempature change going down the length of your body as we desended. We were wearing wetsuits, but that was 30 odd years ago.........and we were tougher than.

[captainmaniac]

Vacuum effect is pretty common. As one of the other posts indicated, crack a hatch or two forward to allow positive pressure and ventilation of the cabin and cockpit areas. Might not work in ALL situations, but definitely works for the majority of them. Remember that fumes are heavier than air, so whatever enters the cabin will stay there until evacuated somehow. Unless we are taking spray, we always keep at least one hatch open so that when we arrive at our destination, the cabin is fume free.

[foofer b]

That's what I had to do- crack the front hatch.

As for diving sub 55 degree water, you can have it. I don't have a drysuit, so we just go to the springs (72*) or go to the movies!

How about oiling the formica??

[Paul]

There is a company called Salisbury Muffler who makes a rubber "boot" that installs over the exhaust port on the transom and re-directs the exhaust gases down below the water line. I used their concept and made one out of fiberglass (West System) that goes around the trim tab and drops into the water at the outer edge of the hull. This has reduced exhaust smell by about 80% and I'm sure that if I modefy the cavitation plate and make it larger this problem will be gone.

Hope this helps.