Westsail Owners Alliance - Thread: "Lazarette Hatch Ventilation For Engine?"
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Thread: "Lazarette Hatch Ventilation For Engine?"

12,268 posts on 2,444 threads   •   From Mar 07, 2004 - Jan 08, 2012


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Lazarette Hatch Ventilation For Engine?

Randell 'Randy' Kocurek

Hi, Bud,
Just thought I remembered you saying that there should have been a block of wood under the lazarette hatch to provide ventilation for that hot, hot engine room. My hatch has not had such a block, as far as I know, and the bottom of the teak frame sits flush on the hatch coaming. I saw George S. yesterday and his W28 has ventilation in its lazarette hatch, though not blocks of wood.
My question is,
"How do I bring the teak hatch ventilation back to original intended specifications?" There is a hole cut in the side of the cockpit that I would like to close. I think a fan used to live there.
I am thinking some 1/4" or even 1/8" spacers under the lazarette hatch would give plenty of ventilation and still do a pretty good job of keeping out water (sort of like a Dorade vent due the higher coaming). Of course, I may be wrong.
Thanks in advance.

Don Montgomery and Lana Nelson

Don't mean to butt in here but we installed an exhaust fan that vents out through the bullwork and the engine runs about 8 degrees cooler and the cabin is a lot cooler after shut down as it creates a negative pressure in the engine compartment.

Randell 'Randy' Kocurek

Thanks Don for the info. You say the fan vents through the bullwork: where would that be exactly? I don't understand that detail. My boat has a hole in the stbd side of the cockpit, just a few inches below the main deck.
I am leaning towards installing a fan, too. From what I read it sure helps the alternator, etc..., only need to run it when engine is running and shortly thereafter so energy draw should be minimal, etc.

Tom and Barb Koehl

When clearing out the crap from my boat I discovered a small blower attached to a short 1x6 with angled ends, as though it was meant to wedge into the hull near the stern. Also, the forward wall of the lazarette box is short of the underside of the deck by about 6 inches. Could this have been an ER exhaust fan? Would it make sense to hardwire a blower to the engine ignition, or this that just asking for problems down the road? What type of ER ventilation do others have? I installed a Lewmar hatch - would leaving that open be enough?

Don Montgomery and Lana Nelson


We installed an inspection port forward of the aft hawse pipe that we unscrew when we want to vent. We placed the fan as high as we could in the engine compartment to pull the hottest air and ran flexible hose to the inspection port. We used metalic tape to fill any voids. Hope this helps. All due respect to Bud if he has other ideas.

Stephen and Lu Ann Yoder

I installed a solar-powered Nicro vent on the lazerette hatch on my W28.

Jay Bietz

Pygmalion has a ~3" squarrel(sp) cage fan that pulls air from the ER into the cockpit.

It's on with the engine - runs all the time. Does keep the engine room cooler.

Randell 'Randy' Kocurek

Perhaps I could consider doing a combination of the above. There's already a hole cut in the cockpit for an old fan installation. I could rig it for an inspection port and take it from there. That way I could close it for boarding seas which is the goal.

Bud Taplin

There are many ways to accomplish getting more air into the engine compartment. Westsail took the simply solution originally by putting blocks of wood on all four corners on the underside of the lazarette hatch, and having cutouts on the outboard top ends of the lazarette bulkhead. Another idea to to install a low profile vinyl vent on the aft deck behind the hatch. A blower could also be installed under the vent.

Wendy Smith and Paul Bowling

My partner Paul went for an option similar to the original. He designed some wooden blocks that sit on all four corners of the hatch base, but can be removed and the hatch sealed when not needed to vent. Also when we run the engine, Paul removes a few of the boards on the internal access to the engine to allow a flow of air. This works well even though it increases the engine noise in the cabin.
We always try to go for the less electricery option, where possible.
Cheers Wendy

Rich Morpurgo

I installed a nicro solar vent in a hole behind the laz hatch. It draws air out.

I also put a solar vent in one of my anchor pipes when the boat is stored. This one sucks in.

this has kept the nasty musty stuff out of the boat even when stored for long periods of time in florida during rainy season.


Rod Lawson

Bud, it appears that the later model deck mold has a vent gap built into the aft lazarette. I have a bilge blower mounted in the aft lazarette which moves air through the vent.

Randell 'Randy' Kocurek

Well, Bud,
Got to hand it to your Westsail engineering once again. On rechecking my hatch (for the umpteenth time), I found a perfect spacing allowed by strips of wood that did provide the ventilation for the teak hatch (combined with the cutout at top of lazarette bulwark), just as it came from the factory, I suppose. So, I'm glad I put the hatch back together like I got it off. Perfect. Simple as you say. Thanks.

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