Crank Mount Raw Water Pump

honestcharlie56
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Posts: 247
Joined: Tue Jul 19, 2016 8:27 pm
Location: Lake Charles, LA

Crank Mount Raw Water Pump

Postby honestcharlie56 » Sun Nov 10, 2019 8:06 am

Has anyone converted their raw water pumps from belt drive to crank drive on their chryslers yet? If not, I will probably be attempting this and providing a write up. Benefits include: much less side load on bearings, less maint (eliminating the belt), possibly more reliable (eliminating the belt), easy to change impeller, lower position of pump is less inlet side head to overcome during starts, etc.

ANY THOUGHTS?
1990 Marinette 32 Sedan Flybridge "Hubba" Lake Charles, LA
Twin Chrysler 318's

EWRice
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Re: Crank Mount Raw Water Pump

Postby EWRice » Sun Nov 10, 2019 8:13 am

I think the Volvo Penta pump would be a good candidate for this. I wish I had room to fit pumps like that on my boat but there is not enough room between the crank and bulkhead.
Muskegon Lake
1972 32' Express flybridge
"AL13"
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson

honestcharlie56
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Posts: 247
Joined: Tue Jul 19, 2016 8:27 pm
Location: Lake Charles, LA

Re: Crank Mount Raw Water Pump

Postby honestcharlie56 » Sun Nov 10, 2019 8:52 am

EWRice,

We are headed to the boat this am to check on this. Finally had a riser rust through so we are working our way through that.....super fun.
1990 Marinette 32 Sedan Flybridge "Hubba" Lake Charles, LA
Twin Chrysler 318's

barefoot99
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Posts: 64
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Location: Cincinnati OH

Re: Crank Mount Raw Water Pump

Postby barefoot99 » Tue Nov 12, 2019 7:45 am

Wish I had the room , same issue - too close to the bulkhead .
SUP !
1982 32 Sedan FB
2069 hrs
360's(rebuilt)-Edelbrocks, DUI
Raw water cooled
Norris Lake
Speedwell,TN.

Fastjeff
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Re: Crank Mount Raw Water Pump

Postby Fastjeff » Tue Nov 12, 2019 9:41 am

Diver Dan solved that problem, but for a different reason: He put big block Chevies in his 32 Express. The front ends of the engines protruded through the bulkhead (cut away?) and into the cabin! Weird but it worked.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

honestcharlie56
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Posts: 247
Joined: Tue Jul 19, 2016 8:27 pm
Location: Lake Charles, LA

Re: Crank Mount Raw Water Pump

Postby honestcharlie56 » Wed Nov 13, 2019 6:22 pm

Well my 1990 32 SDFB has plenty of room in front of the two 318's to run the pumps. I'm not sure when I'll actually get to it considering we're having to replace exhaust pieces, thru hulls, bottom paint, top side paint, props, etc. etc. etc.
1990 Marinette 32 Sedan Flybridge "Hubba" Lake Charles, LA
Twin Chrysler 318's