1949 Merc. Water Pumps

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David Lien

Member
Is their any advantage or disadvantage to running 49 Wide belt water Pumps. Looks to me like the pulleys are in a different spot??. I have a couple of different styles and was going to send a pair off for rebuilding. thanks up front for any advice that I can get... David
 
Running them on what? I believe the wide belt Mercury pumps are the least used of any on the 8BA series (they are not reproduced). They would only be practical on a concourse correct restoration.
 
Is it a car or truck? I think they are different in the way the motor mounts. Truck would be the flat mount and wide belt, I can only speak about the truck, I haven't played with with a car flattie....yet. I think the car mounts are angled??

cheers

This is in a '49 F-47
 

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I'm using the later Merc narrow belt pumps on the 8ba in my '39 p/u but at one point had a '49 with the wide belts. The later pumps use a u shaped spacer between the rubber motor mount and the water pump mounting flange. The '49 wide belt pumps used a more square looking spacer IIRC. Mac Van Pelt will known the exact details as the issue of Merc pumps has been discussed in the past.
 
The 49 pumps had a unique isolation mount that was not available for many years and they used the wider belt drive set up more similar to trucks. The 50 & 51 cars used a Lincoln style biscuit isolation mount that is a bit easier to find since they were used in some trucks as well. The 50/51 pumps with the narrow belts and unique fan can allow an engine to be mounted a bit lower in the frame if the right spacers are used. It can also give a bit more radiator clearance but not by much.
 
rotorwrench said:
The 49 pumps had a unique isolation mount that was not available for many years and they used the wider belt drive set up more similar to trucks. The 50 & 51 cars used a Lincoln style biscuit isolation mount that is a bit easier to find since they were used in some trucks as well. The 50/51 pumps with the narrow belts and unique fan can allow an engine to be mounted a bit lower in the frame if the right spacers are used. It can also give a bit more radiator clearance but not by much.
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Came to say this. The mounting ears are approx. 3" higher on the Merc. which sits the engine much lower if using biscuit-type mounts.
 
Here's the Merc pumps and mounts.
 

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For any non original application you'd be better off using truck water pumps. As noted, they would allow you to use the original style biscuit mount for a cleaner install. Also, replacement pumps down the line are much easier to acquire.
 
That depends on where a fabricator wants the motor to set. Truck pumps are the norm but if you want the engine lower then the frame mounts have to be altered. My point is that Merc pumps can be adapted for those situations as well. I rebuild my own pumps so folks not using them leaves more for me to rebuild. It's good for folks to know what else might be available in the early ford parts world when fabricating non stock set ups. I like the Merc fan set up better than the truck for tight spaces but sometimes that's not enough.
 
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