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RCPRATHER
#1 Posted : Thursday, February 10, 2011 11:20:28 AM(UTC)
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Hello all,
Does anyone have an idea of what was the original cfm of the blowers were? Or does anyone know how much ventilation is required to vent the engine compartment in a 32 express? One blower or two?
Thanks,
Rob
"Great Escape"
32ft 1972 Express
Twin 318's
Located at LBYC
On the Ohio River at mile marker 480
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HuckFinn
#2 Posted : Thursday, February 10, 2011 2:02:50 PM(UTC)
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Hey Rob
My express only has one blower (don't know the CFM) on the starboard side. I read once there should only be 1 blower but what do I know. I did buy dryer vent hose at HD and redid the scoop vents to go to the bottom of bilge, old black hose was rotting away. Looking forward to going to Ludlow a few times, good times, good food, hot mermaids, cold brewskis, what more could you ask?
Rob
PT-73
1973 32' FB Express
Chrysler 318's
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Doug Doty
#3 Posted : Thursday, February 10, 2011 3:16:02 PM(UTC)
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HuckFinn wrote:
Hey Rob
My express only has one blower (don't know the CFM) on the starboard side. I read once there should only be 1 blower but what do I know. I did buy dryer vent hose at HD and redid the scoop vents to go to the bottom of bilge, old black hose was rotting away. Looking forward to going to Ludlow a few times, good times, good food, hot mermaids, cold brewskis, what more could you ask?
Rob


I am so ready for a cruise to Ludlow's ! Can't get warm soon enough. I want to go this speed all the way. !!

Doug...

466 Bertram FDMY, " Easy Rider "
1984 39 Marinette sedan, " LIBERTY ONE "
440'S 19x22 wheels, 710 HOURS
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fastjeff
#5 Posted : Thursday, February 10, 2011 10:25:16 PM(UTC)
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My 32 Sedan has two: one on each side of the keel.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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RCPRATHER
#6 Posted : Thursday, February 10, 2011 11:05:34 PM(UTC)
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Rob / Doug
I to am ready to sitting on the boat drinking a few cold ones. I didn't get a chance to run much last year do to the fact I spent my wade on everything else the boat needed. This year I am getting those engines running top notch and plan on running the river more. He$$ if it gets up to 45* this weekend I plan on heading down and pulling the carbs and bring them home to rebuild.

Jeff,
I guess my thinking is two is better the one one something like this? Are you serious about Harbor Freight? I always was unsure about their quality of their tools????
"Great Escape"
32ft 1972 Express
Twin 318's
Located at LBYC
On the Ohio River at mile marker 480
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fastjeff
#7 Posted : Friday, February 11, 2011 2:21:01 AM(UTC)
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Most of Harbor Freight's stuff is worth what you pay for it!

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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ComputerJoe
#4 Posted : Friday, February 11, 2011 6:53:34 AM(UTC)
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HuckFinn wrote:
Hey Rob
I read once there should only be 1 blower but what do I know.
Rob


Marine surveyor told me the same thing. Mine is mounted on the starboard dead rise just forward of the transom.
http://www.therightscoop.com/open-thread-grinding-america-down/
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Doug Doty
#8 Posted : Friday, February 11, 2011 10:35:50 AM(UTC)
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My boat had one removed and never replaced, the one and only PO was nutty with maintenance so this may explain it.
466 Bertram FDMY, " Easy Rider "
1984 39 Marinette sedan, " LIBERTY ONE "
440'S 19x22 wheels, 710 HOURS
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fastjeff
#9 Posted : Friday, February 11, 2011 1:15:14 PM(UTC)
fastjeff

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One or two blowers...Just make sure the hoses are attached at the TOP (where the air exits). Mine were not. After a year plus of running the blowers religiously for 4 to 5 minutes before hitting the starters, the air--fumes and all--was merely recirculating in the bilge!

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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RCPRATHER
#10 Posted : Sunday, February 13, 2011 11:57:23 AM(UTC)
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Started sanding with my new Harbor Freight sanders today. It was 55 degrees today here.
Thanks,
Jeff
"Great Escape"
32ft 1972 Express
Twin 318's
Located at LBYC
On the Ohio River at mile marker 480
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shamrock
#11 Posted : Sunday, February 13, 2011 12:13:56 PM(UTC)
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I went down to the boat and hung out with that bitch Stella! Cranked the Volvo's and the generator and let them run for 20 minuets. I left the intakes and vents stuffed with foam rubber, just opened the rear hatch. Great weather in K town.
1981 37 Sedan Bridge
Twin 185hp Volvo diesels, Props 19X19 four blade
Twin 150 Galion fuel tanks, Twin 50 Galion water tanks
7.7KW Westerbeke diesel generator
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Barkleydave
#12 Posted : Sunday, February 13, 2011 12:42:59 PM(UTC)
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Someone mentioned using dryer vent hose.
Here is a little info. When I completed Michigans livery inspection program in the 80's they did not except "slinky Kinky" type hose and would only accept USCG solding hose. It is very hard to find and route that big stuff a real pain. The reason was in case of a fire the slinky kinky will burn thru very quickly. My problem is if there is a fire... the vent hose does you no darn good anyway so whats the big deal??

Federal Law is silent on the material required. It only requires ventalation on areas where spaces contatain gasoline. Diesel is exempt. Actually federal
requires only require intake and exhaust requirements. There is NO regulation that requires power ventalation on recreational vessels.

Ofcourse blowers are a plus. One or two makes no difference just that two would provide for a more rapid exchange of atmospere.

safe boating,
dave
None
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bpboater
#13 Posted : Sunday, February 13, 2011 11:03:45 PM(UTC)
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I like having two blowers. One is 12 volt, the other is 120 volt. When we stay away from the dock overnight, the batteries get low. When running the generator, I need to have a blower running. The 12 volt blowers take about 10 amps each. So, two 12 volt would take 20 amps of power. My battery charger is just 30 amp output, so it took forever to recharge the batteries. Now, when I run the generator, I just turn on the 120 volt high cfm blower, and enjoy being able to recharge the house batteries faster.

The generator battery is isolated from the main and house batteries, so the alternator output from the generator only recharges the generator battery.

The 120 volt blower is a squirrel cage type that is small in size and usually used to provide combustion air to furnaces.

Just another way to approach blowers.
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jimski2
#14 Posted : Sunday, February 13, 2011 11:40:58 PM(UTC)
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With the generator running, it is a blower for engine space fumes.
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shamrock
#15 Posted : Sunday, February 13, 2011 11:58:19 PM(UTC)
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I like the 110 blower idea it would help keep the generator cooler and freshen the bilge air.
1981 37 Sedan Bridge
Twin 185hp Volvo diesels, Props 19X19 four blade
Twin 150 Galion fuel tanks, Twin 50 Galion water tanks
7.7KW Westerbeke diesel generator
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Barkleydave
#16 Posted : Monday, February 14, 2011 1:04:45 AM(UTC)
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Sounds like a nice idea assuming the 120 VAC blower is ignition protected?

None
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fastjeff
#17 Posted : Monday, February 14, 2011 5:41:12 AM(UTC)
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...There is NO regulation that requires power ventilation on recreational vessels. "

Actually, that is NOT true with inboard boats having fuel tanks permanently installed below decks.

We do USCG Aux vessel safety inspections and, per the requirements, we are not allowed to issue a sticker without HEARING the blower run, even if it's there.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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Barkleydave
#18 Posted : Monday, February 14, 2011 9:17:57 AM(UTC)
Barkleydave

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Jeff:

We are both right!

1. CME requirements do not ALWAY follow CFR exactly. There are items on the CME list which are optional and not required by law. For years I had to deal with Aux volunteers which 99 percent of the time were great. The other 1 percent were a pain.(always a couple of wanna bees in every group) I arrested three in my career for actually stopping and boarding vessel while underway. Also I had one guy that always failed if they did not have a bailing bucket on board thats ok but then told folks they could not launch at our state ramp! While a bucket for emergency bailing is a great idea and I have several on board, there is not Federal requirement and probably no state requirement that I am aware of.

Boats built prior to 1980 are NOT required to have powered ventalation.
That would include the majority of or big Ms



Here is the CFR source for review:

http://www.boatboymarinetraining.com/pdf/USCG_Required_Equip.pdf

Ok for those that wish to dive into this often confusing topic here are the safety USCG safety bulletins dealing with the subject in 33 CFR
After dealing with this issue for 30 years I still got confused and basicly If it had ventalation of either type I considered it an educational opportunity unless it was factory installed incorrectly. I knew if a judge had to wade through all this he would never rule in favor of the state at a bench trial and no way if it ever went to jury.

http://www.uscgboating.org/assets/pdf/recalls/BSC69.pdf

safe boating dave
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