okay, okay - i’ll run a relay off the regulator
off the balmar
power circuit, fans will come un whenever I have ignition turned on for simplicity.
While the oil
pressure switch idea is nice, they are usually NOrmally Open, reverse of what’s needed. I like the limit switch idea.
GILow was wondering about no current
blowers - it’s a ‘67 Columbia
50, has survived 53 years without one so far. Wood sole and interior
, so the engine compartment is plenty ‘leaky’ - tons of floor penetrations for plumbing
It currently has a yanmar
4jh-hte with manual stop linkage - there are no relays on that engine to ‘double up’ on.
The engine is amidships under the cabin sole
, about 5’ behind the mast
. I can pull ‘intake air’ from the undersink cabinet in the head
, will only have about a 3’ run to the alternator
air is another story- it’s about a 20’ run from on top of the engine to the stern, where I have a pair of 3” cowl vents. I was thinking of using a 4” blower to dump air into the cockpit
locker/cockpit sole area, where it could naturally circulate back to those vents, rather than run a 3” duct all that distance to one of the cowls, but Just had a second thought, though, that if I had a smoky mess at some point from an oil leak
, that would be dumped in there too, mucking up a LOT, so maybe I’d better duct. Those stern cowls also service
genset in the lazerette, so I’d prefer to leave them be....maybe just duct to the lazerette........You’ve gotta love design compromises (sigh)
Thanks for all the input so far guys, much appreciated. Keep it coming.
Ps - there’s a line drawing of the boat
here - you can see my duct-run problem....