Engine room ventilation blower E34-2

[Phr3d]

There is an in-line blower (very noisy) in the starboard cockpit locker. It looks like the hose is missing from the blower to ??? The blower is about a foot from the bulkhead.

How should this be done? does it have to reach an outside vent? The survey calls this issue out for correction.

 

[Prairie Schooner]

Our blower isn't working, though it's there inline. We don't have a problem with engine overheating. We'll address the blower in the next year or so. There are some good discussions in these threads to get you started. And likely someone will chime in here on your specific question.

Comprehending the air cavity for engine air cooling as it's very confusing help...

1972 Ericson 35-2. Atomic 4 engine under seatee in lounge area. Blower (working great) sucks air from bilge area under engine, opening is 4-5 inches from transmission box, exits out starboard stern side through cowling. Cowling providing air intake on port stern side (so a flow of air in air...

ericsonyachts.org

Can I remove the blower and hoses?

My 35-3 has a blower and hoses. There's a switch for the blower on the electrical panel, but it doesn't work. Didn't work for previous owner either. I have a Yanmar diesel engine, so don't need a blower, and was thinking of just taking everything out and reclaiming some space. But then I...

ericsonyachts.org

engine room circulation and transom cowl vents

The 32-3 has a pair of transom cowl vents and were once connected to flexible dryer hoses. I am puzzled how these hoses are routed and their functions. The starboard side air hose (left of below picture) emerges from the fiberglass pan near transom then disappears near the rudder shaft. The...

ericsonyachts.org

Jeff

 

[Christian Williams]

I have only passive ventilation and no issues. Not sure a blower is required for diesel, as for gasoline.

 

[Loren Beach]

Not sure a blower is required for diesel, as for gasoline.

It's my understanding that it is not required for a diesel engine. That said, I have always been advised that exhausting hot air from the engine compartment helps the alternator live longer and also helps (by about 5%) to remove heat from the engine. We run ours all the time when engine is on. The old flexible "dryer" type hose has about a 20 year lifespan before heat and fumes turn it brittle and it starts breaking up.

 

[Phr3d]

There are two vents off the top of the transom. Are they related to these hoses?

 

[Loren Beach]

There are two vents off the top of the transom. Are they related to these hoses?

One is likely connected to a hose leading into the engine compartment and the other is certainly (or ... was) connected to the vent hose from the engine compartment.

 

[Phr3d]

One is likely connected to a hose leading into the engine compartment and the other is certainly (or ... was) connected to the vent hose from the engine compartment.

That is exactly what my math indicated. There are currently no hoses in any near vicinity of said vents. I think they are laying on the floor of the lazarette. Hmmmm...

 

[JSM]

Took the non functioning blower and rotted hoses out of our 34-2 seven years ago and threw them away. Don't know why it was ever installed.

 

[N.A.]

I have a 34-2 with a Yanmar 3GM30F, and my blower also has never worked. I kept an eye on heat down there, but it never seemed an issue and I have stopped monitoring it. The engine seems to get plenty of air to run, but I also always have the companionway open when running it so maybe it's more of an issue when everything is buttoned up (e.g. in bad weather.)

Re: the vent hoses... if people mean the little fittings on the transom (not the big "dryer-vent" one connected to the blower tubing), you better get those right -- one is the overflow for the fuel tank and the other is a fuel tank vent line. You do not want those disconnected... then fuel could end up in the bilge at some very inopportune time. Aside from being a hassle, from reading reports from sailors caught in nasty storms it sounds like fuel in the bilge is pretty debilitating in bad weather -- there is no escape in the sealed-up boat, and the fumes make everyone feel terrible at the worst possible time. I can't remember if it was a 1979 Fastnet race report where I saw something about this*, but regardless, you want those lines connected to the outside, vent openings facing down, and not leaking.

* There is at least one 79 Fastnet racer on this forum; they can add comment if they want to / know.

 

[Phr3d]

big "dryer-vent"

This was the ones I meant. They are currently both facing forward. Is that correct?

I will verify the 3" tubing is laying on the lazaret floor. I assume they are held on with hose clamps?

 

[Christian Williams]

They're called cowl vents, the shape being of a cowl on a monk's habit or maybe a hoodie.

Point them as desired to catch air and exhaust it.

Unless you have a blower installed there's no reason to reattach the hoses, and in fact if attached they'll defeat the passive ventilation.

 

[G Kiba]

My 911SE came with an elaborate venting system that I can't really justify as a need but is so well put together I'm keeping it! One cowl on the transom is air intake and the other exhaust. Both lines have inline fans. Hoses are a rigid plastic (irrigation hose?). Both fans are on a toggle switch in the cockpit that can be turned off or on when needed. I usually on when the motor is on and off when I want to better hear just the engine.