fumes

[accent33]

i own a 33ft. strike that i charter in costa rica every one relly loves this boat ,however i do get some complants about fumes from cutermers when they are fishing i too have noticed it from time to time but i thought it was just the nature of the beast .depends on how slow they troll and wind .is there anything i can do to help stop this?

thanks

sam

[cyclops]

A carefull adjustment of the fuel mixture at that speed is about it. Underwater exhaust ports close to the keel that can be opened and closed from the bridge is the absolute best you can do. The water chills the gases and "scrubs" the exhaust bubbles. Good off time job.

[accent33]

the boat seems to be running very well .not hardly any smoke but i do think its a pain. we charge a lot of money and offer only the best so i want to address every thing i can .could you explain what it would involve to make it so it goes into the water? cant you leave it like that all the time? and if is not smoking and seems to be running very smooth could it still need fuel ajustment like you said? we do get a few weeks of down time and any work need could be done ,however we are talking costa rica so a real tricky fix may not be possable due to local help

thanks for your help

[Corpus Skipper]

Nature of the beast really. I assume you have diesels. Underwater exhausts only work while underway, they still have relief ports above the waterline that kick in at low speed, just like an outboard. If you don't get much smoke your engines are probably tuned well. You'll always have some fumes, just try to keep the cockpit in a crosswind while trolling (yeah, right). If you ever run out of customers, I'll volunteer to go along!

[accent33]

no your right is mostly people that havent even been on a boat like this. we are sailfishing outfit so slow patterns back an forth in and out on the wind. i just wanted to fix it if it could be address. i like everything perfect on my boat. you can check her out on our site here... http://www.queposfishing.com/boats/quepos.htm if i thought the below water set up would really work and not be to hard to do or operate. i would have it done in a heart beat thanks again

[PowerTech]

yea alot of diesels smoke at low speed the high performance ones like you have are the worst .the newest computer controled electronic ones hardly smoke at all if at all though.Is it smoking like a light bluey grayish smoke like a cold incompleat burn.or is just the wimps cant stand the smell of exhaust at all.this product has helped alot of our coustomers with stinky smokey 6LP-STE yanmers and stinky smokey 6 and 7 lieter volvos.It takes a quart of it to get the full 8 cetane point in 60 gallons of feul so we sell by the case to the dudes.And how many hours are on them

[accent33]

800 hours and it only the wimps that complain in fact I don't even see much smoke. its just the fumes really, I have been on boats where you really see it. but on ours its very light and kinda grayish .I guess I just hate to here anyone complain its only been a few but I would do what ever it took to fix it if there was really a fix

[woodboat]

Have you looked at this http://www.thefishwrapper.com/news/s...s/2127949.html
http://www.centekindustries.com/

[Corpus Skipper]

Sure is a purty boat, but you swiped my name! (my Chris Craft is named "The Reel Deal") Oh well, I'm sure there's 20 more with the same name

[PowerTech]

I forgot to leave the link to the product we use with sucses.here is is remember you should get a case or three so you can treat all your feul all the time with out running out it works it improves the combustibility of the feul.http://www.fppf.com/prd8PlusCI01.html

[marshmat]

Non-electronic engines- diesel or gas- can be tuned for only one optimum speed. For your 370hp diesels this is likely on the order of 80% output, or planing cruise speed. At idle they will not be running optimally and will smoke and smell. All engines do this- cars, outboards, diesels, whatever. Electronic controls allow engine tuning to be actively varied at all speeds, so they don't smell as much at idle. Fumes are a fact of life.

The only fish boats I've heard of that don't draw some fumes back into the cockpit while fishing are catamarans that vent the exhaust between the hulls. Underwater exhausts, as mentioned before, only really work while underway. I'm not familiar with the stuff PowerTech mentions but it sounds like it's worth a try; better combustion will mean less noxious fumes. Try also using a different brand of fuel as the diesel you are using may be high in sulphur, which is the main source of bad smells in fumes. (You could also try burning B100 biodiesel while trolling, the fumes from that smell like a french-fries truck.)

[accent33]

thanks guys for all you in put .1st let me say that I am sure the fuel we get in Costa Rica is pretty bad and as for that link to the product it didn't work. I think I will just have to work on captain ,try and make him understand about the fumes I am sure when he is up in the tower singing to him self the fumes never cross his mind I need the mate to let him know if it blowing in and have him veer off line a little .what do you think about that idea..

[woodboat]

Marsh mat, Not sure why you said under water exhaust only work while under way.
Quote from the fish wrapper

With this configuration, the muffler not only quiets the exhaust system but also helps route exhaust away from a boat's stern. This eliminates the danger from backdrafting exhaust and allows boaters to converse in normal speaking tones.

I have read a local magazine, chesapeake bay, that tested the muffler and thought it was wonderful. It was designed to eliminate this problem of fumes on the stern deck. Here is another mention of it.
http://www.powerandmotoryacht.com/co...st/index1.html

[PowerTech]

on sail boats under water exhaust is compleatly under water some have relief ports but often not because the little guys don't need it.but on power boats with large engines they need a relief port coming out of the top of the box the under water exhaust dumps into some thing like a 1.5" hose on each side of the boat above the water line and smoke dumps out of the holes on stinky motors when not on a plane.the motors are so stinky because they are hot rod after cooled bad asses that are forced to idle around all day troling a fishing lure.they shine up the walls and puff puff puff.I think the under water exhaust may quiet it up some and maby create a little lift and stop a little soot build up on the transome And for that link you need adobe reader or acrobat or some thing like that sory do a search of the product and you will find it some were.It's called FPPF plus 8 ctane booster

[woodboat]

This muffler was not created for hot rods to my knowledge but to address the fumes issue

That’s probably why engineers at Centek Industries, a sponsor of the National Clean Boating Campaign, created a muffler designed to silence the noise of underwater exhausts and minimize their fumes by combining the main underwater exhaust outlet and bypass silencer into one unit.