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Old 12-02-2011, 02:26 AM
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snook91901 snook91901 is offline
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Blower Ducting Set Up

I'm the proud new owner of a '63 Columbia 29 with an uninstalled A4. I am trying to plan my ducting for the engine compartment blower but I have a bit of a problem.
I'm not sure if the typical set up with an intake under the engine in the engine compartment leading to a blower fan and then a rear facing cowl is the wisest set up for my boat. The problem is that the bilge is open to the engine compartment. Therefore any gasoline fumes will collect in the bottom of the bilge instead of the engine compartment. This is potentially dangerous IMO as the typical intake set up will not evacuate the fumes and any spark in the bilge, say from a faulty automatic bilge pump, could ignite them.

So should I
(1) run my intake down into the bilge
(2) have an intake both under the engine and in the bilge with a T connector
(3) do my best to seal up the connection
???

I'm hoping to avoid option 3 because several connection run through this passage, but I realize it may still be the best option.

ps this is my first posting to the forum so let me say thank you to everyone at MMI for keeping so many A4's alive.
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