hull side air intakes

g36 · Post by **g36** » Tue Sep 11, 2007 8:43 am

just purchased 1978 f-32 trojan all 4 of the air intakes on the hull sides are pointing forward, knowing this was designed to circulate air in the engine room as the boat is moving it seems there should be at least 2 pointing aft which would allow incoming air a way to be pulled out by the rear facing vents. were they all designed to face forward or has someone changed the direction on them by mistake? any thoughts? i noticed on some trojans for sale on the internet even have them all facing back so just wonder which should be forward and which facing rear?

jav · Post by **jav** » Tue Sep 11, 2007 10:00 am

I believe two are supposed to be facing aft and 2 forward. The problem (at least for me and a few others I know of) is that the forward facing vents tend to suck in spray. I beleive this is why you see so many boats with all vents facing aft. I've not seen one with all vents facing forward.

Stripermann2 · Post by **Stripermann2** » Tue Sep 11, 2007 10:24 am

The front (midship) grills face aft and the rear grills face forward.

TADTOOMUCH · Post by **TADTOOMUCH** » Tue Sep 11, 2007 3:40 pm

Do a search on the internet for Sea Mar II which sunk in Lake Michigan possibly due to an incorrect louvre installation which resulted in scooping in large amounts of water in high seas. I believe they discuss a lawsuit pending with Trojan based on a manufacturing error. Obviously with Trojan out of business, the lawyers don't get paid. Too bad for them. But also so sad for the families of the three who perished.

http://www.michiganshipwrecks.org/seamar.htm

obeejr · Post by **obeejr** » Tue Sep 11, 2007 5:06 pm

Is this why the midship grills were moved up above the gunnels on the later f32s?

prowlersfish · Post by **prowlersfish** » Tue Sep 11, 2007 7:08 pm

do you have any info on the recall ?

duchess · Post by **duchess** » Wed Sep 12, 2007 7:23 am

Your right they were moved up i would call Marine Tech for further definitive information about the correct location

jav · Post by **jav** » Wed Sep 12, 2007 12:34 pm

TAD-

thanks for posting that great link- it was quite an interesting read. I'd never heard of that issue but I'm gllad I no longer have the old vent system.

rossjo · Post by **rossjo** » Wed Sep 12, 2007 12:46 pm

The old vents weren't the crtical problem here.

Having only 1 bilge pump, and having it up front was the final blow. This is marginal at the dock (need 2 fore + 2 aft), but totally unacceptable underway. The forward pumps will nver pump the rear out underway, and the boat will take on water (shaft seals, spray, vents, cockpit deck, etc.) and continue to fill until it sinks.

Does ANYONE NOT have rear bilge pumps? I you don't, then remain at the dock until you do!

TADTOOMUCH · Post by **TADTOOMUCH** » Wed Sep 12, 2007 2:22 pm

I have two bilge pumps. One fore and one aft. The fore pump has a large housing that does not allow for all of the water to be pumped out because it sits above the V in the hull. The aft pump works great underway but the fore pump lets too much water sit in the hull when docked and I would like to get all the water out that I can so as not to rot out the stringers or bulkeads. Anyone have suggestion to get all the water out of the bow end?

jav · Post by **jav** » Wed Sep 12, 2007 2:56 pm

this is my pump configuration. I have 4 total- 1 auto fore, 1 auto aft, 1 emergency high capacity with high water alarm aft and 1 small diameter electric (manually controlled) in the bows low spot to suck the bilge dry. It had to be manually contolled because a float would stop the pump before all the water was sucked out. The only problem with this setup is that there can be some standing water in the bow at rest for the same reason you state. But, it's nice to be able to pump it dry before heading out.

jddens · Post by **jddens** » Wed Sep 12, 2007 3:51 pm

i have twp pumps, one fore and one aft. Both on float switches and can be turned on and off manually. Guess I'm lucky but my boat stays dry with the exception of a very small trickle from one rudder seal, and then only when underway..........never enough to run the pump. I occaisonally check them manually but never pump any water.......

TADTOOMUCH · Post by **TADTOOMUCH** » Wed Sep 12, 2007 4:28 pm

I think I will install a manual pump to pump the bow end dry by hand occasionally to keep it dry. The shafts do not leak that much so it should stay dry up front for a week if I manually pump it dry. There used to be a manual pump in the starboard locker in the v-berth and there is already a through hull fitting capped off in there so I can just hook up a manual pump and put the suction hose right in the lowest spot to get out the last bit of water.

prowlersfish · Post by **prowlersfish** » Wed Sep 12, 2007 9:46 pm

JAV I like your vents ( sent PM ) agree on the pumps

jav · Post by **jav** » Wed Sep 12, 2007 10:37 pm

Thanks Paul

email and pics sent.

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hull side air intakes

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