Replacing my "engine room" blower? - SailNet Community
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post #1 of 26 Old 11-17-2013 Thread Starter
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Replacing my "engine room" blower?

I have a squirrel cage blower mounted in the space under the 1/4 birth separated from the engine space by a plywood bulkhead. It uses two holes in that bulkhead for the hoses that take in air from the engine space and discharge it into a hose that reaches all the way to the stern rail vent.

I would like to change this setup. I have a better use for the space the current blower occupies. I would prefer an inline blower mounted aft of the engine space.

Does anyone have any experience with inline blowers? Any reasons for not making this change?

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post #2 of 26 Old 11-17-2013
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Re: Replacing my "engine room" blower?

Gas or diesel engine?

Brian
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post #3 of 26 Old 11-17-2013
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Re: Replacing my "engine room" blower?

I have one of these fans from westmarine in the engine compartment of my boat...it is switched separately from the engine ignition so I can let it run for a while after shutting off the engine. Works fine for me and it was pretty cheap.


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post #4 of 26 Old 11-17-2013
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Re: Replacing my "engine room" blower?

Was at Radio Shack this afternoon and saw they had 4" brushless (no sparks!) DC fans that might work well in your setup. Theyre not "marinized", but for $20...
12VDC Brushless Fan : Computer Fans | RadioShack.com
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post #5 of 26 Old 11-17-2013
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Re: Replacing my "engine room" blower?

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Was at Radio Shack this afternoon and saw they had 4" brushless (no sparks!) DC fans that might work well in your setup. Theyre not "marinized", but for $20...
12VDC Brushless Fan : Computer Fans | RadioShack.com
Yikes! This strikes me as one of those penny saved pound foolish things.


I can't even imagine the liability if you had a fire and burnt down a marina full of boats or hurt someone. And I mean the 'right' one shown above is only $30 at WM. I'm sure you could get it even cheaper somewhere.

But I'd go back to is it gas or diesel? If it's diesel just lose the fan.
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post #6 of 26 Old 11-17-2013
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Re: Replacing my "engine room" blower?

As to the original post, yes the reason would be that the squirrel ones move a LOT more air, and IMO are more reliable than the cheaper inline ones.

But as you know already, take up a lot more space
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post #7 of 26 Old 11-18-2013 Thread Starter
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Re: Replacing my "engine room" blower?

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Gas or diesel engine?
Gas, A-4

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post #8 of 26 Old 11-18-2013 Thread Starter
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Re: Replacing my "engine room" blower?

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As to the original post, yes the reason would be that the squirrel ones move a LOT more air, and IMO are more reliable than the cheaper inline ones.

But as you know already, take up a lot more space
Volume and reliability are the best reasons I can think of! I might be able to relocate it but it would require a much longer intake hose and a shorter discharge. Now the intake hose is 10" or a little less. It reaches through the bulkhead and angles down beside the engine. The total length of hose doesn't change if I relocate the squirrel cage blower. Does having a longer intake hose diminish the blower's capacity?

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Re: Replacing my "engine room" blower?

Yes a longer hose reduces volume, but how much depends is variable. The longer and rougher the hose the more it matters.

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post #10 of 26 Old 11-18-2013 Thread Starter
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Re: Replacing my "engine room" blower?

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Yes a longer hose reduces volume, but how much depends is variable. The longer and rougher the hose the more it matters.
Total length doesn't change?

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