Bilge Blower Restoration

Corrosion, Paint, Through Hulls, etc.
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carl
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Bilge Blower Restoration

Postby carl » Sat Jul 14, 2018 10:32 pm

I've been hard at work restoring my bilge blower system. Sharing some pictures along my way. I was able to find exact replacements of my Plastic Louvered Vents and Collector boxes, both manufactured by Attwood. More to come...
Attachments
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Last edited by carl on Wed Jul 25, 2018 7:56 pm, edited 2 times in total.
1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Sat Jul 14, 2018 10:35 pm

More pictures...
Attachments
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1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Sun Jul 15, 2018 7:32 am

Vents, Collector Boxes and new Blower Motors installed...
Attachments
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1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Tue Jul 24, 2018 8:07 pm

After a closer inspection and better understanding of my bilge blower/passive air flow system I decided to implement a modification/upgrade to both. Originally the collection/plenum boxes on my aft vents accommodated both circuits, the passive air flow through the bilge and the forced air flow from the bilge blowers. The collection/plenum boxes have two 3” diameter holes in them to accommodate two separate 3” hoses. I’ve added two additional 3” vents (cowls), one port and the other starboard. I am routing my forced air flow from my two blower motors through these two new vents (cowls). This frees up both 3” holes in my collection/plenum boxes to take two passive 3” hoses that I will route into the bilge to maximize air flow past the engines, fuel tanks and under the aft deck. This modification will give me a substantial increase in my passive air flow, especially when underway. An easy enough task and modification, I just had to look at it and process it a while. More to come…
Attachments
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Last edited by carl on Mon Jul 30, 2018 7:55 pm, edited 4 times in total.
1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Tue Jul 24, 2018 8:11 pm

Some more pictures of the modification.
Attachments
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1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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bcassedy
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Location: Aurora, In.
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Re: Bilge Blower Restoration

Postby bcassedy » Wed Jul 25, 2018 7:00 am

Great work!!

... and food for a future project.

"Curse you, Red Carl..." :D

Serious question.... Will you then route/add the passive 3" air intake hose up from the current side ports up to forward of the engines to allow for air flow collection from that point and back to the new exhaust hose?

Bill
Bill & Sharon Cassedy
"Sunset Seeker"
'88 32' Sedan Bridge
Located in Aurora, In.
Twin 318cu in Chrysler
1.5:1 Velvet drive trannies
Fresh water only

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carl
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Re: Bilge Blower Restoration

Postby carl » Wed Jul 25, 2018 8:31 pm

Bill,
The six outlets at the stern of the boat are all bilge exhausts, I now have a total of six 3” diameter bilge exhausts at my stern, four of which are passive and the other two are forced air through my bilge blower motors (these two will also add to the passive when the blowers are off). The total is 42.36 square inches of exhaust venting. The two forward “Intake” cowls under the long Marinette side cowls are hard piped into the engine room through two rectangular aluminum ducts measuring 8 ¼” by 1 ½” which is a total of 24.75 square inches of static intake air (higher when underway) dumping fresh intake air to the sides of both engines port and starboard. I will not modify or try to extend the route of these two factory installed ducts; they are good where they are by design.
Last edited by carl on Wed Jul 25, 2018 9:49 pm, edited 1 time in total.
1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Wed Jul 25, 2018 8:48 pm

In my efforts to improve on the bilge venting aboard my Marinette both passively and forced I found I did not like the way the factory fixed the hoses in the bilge. I can see where they just hastily set one stainless steel screw through each flexible 3” bilge exhaust hose into an aluminum rib, this worked fine off the assembly line to the dealer and then to the original owner but beyond that what a crappy setup. It took me some time to ponder this but I came up with what I’m calling the “Bilge Exhaust Hose Anchoring Plate”. This setup will allow me and any future owners of this craft to easily and securely change out bilge blower hose with the peace of mind that it is installed correctly and will not move about or worse yet, get sucked up to a flat providing absolutely no forced air evacuation of the bilge. More to come…
Attachments
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Last edited by carl on Mon Jul 30, 2018 7:56 pm, edited 2 times in total.
1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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carl
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Re: Bilge Blower Restoration

Postby carl » Wed Jul 25, 2018 8:50 pm

Some more pictures...(because a picture is worth a thousand words)
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1990 Marinette 32' Sedan Fly Bridge
Twin Crusader 350's
Chickamauga Lake, Tennessee

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Busia
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Re: Bilge Blower Restoration

Postby Busia » Thu Jul 26, 2018 2:22 am

"The six outlets at the stern of the boat are all bilge exhausts, I now have a total of six 3” diameter bilge exhausts at my stern, four of which are passive and the other two are forced air through my bilge blower motors (these two will also add to the passive when the blowers are off). The total is 42.36 square inches of exhaust venting. The two forward “Intake” cowls under the long Marinette side cowls are hard piped into the engine room through two rectangular aluminum ducts measuring 8 ¼” by 1 ½” which is a total of 24.75 square inches of static intake air (higher when underway) dumping fresh intake air to the sides of both engines port and starboard. I will not modify or try to extend the route of these two factory installed ducts; they are good where they are by design."


Just don't forget to calculate the air going from the intakes down the carbs to make the engines run.
BUSIA
located in Ketchikan, Alaska. Gods country
32 foot Marinette express. (no fly bridge)
twin 350 Crusader (Chev 350) engines
1:1 Borg Warner velvet drive transmissions
Closed cooling (antifreeze in the engine)
Proud to be retired IBEW