The Ford Barn

sunshine · 06-23-2015, 12:37 PM

I have this set of water pumps , that dont look like any others I have. The # s on them are OCM 8503 and OCM 8504 SINGLE PULLEY. any help . THANK YOU SUNSHINE

toby · 06-23-2015, 12:43 PM

Mercury
1950-51
OCM 8504 LH
OCM 8503 RH

51504bat · 06-23-2015, 12:46 PM

Merc pumps. Early (49-50 or so) were wide belts and the later Merc (51-53 or so) narrow belts. Very similar in appearance to 8rt truck pumps but the mounting pad is at a different height. The Mercs used a u shaped spacer between the front mount and the pump.

rotorwrench · 06-23-2015, 05:02 PM

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The 49 had different engine mounting than the 50 & 51. The 49 still had the wide belts with the early style fan that had the oil reservoir. In 1950 (0CM) the pumps were changed to narrow belt with the puck style engine mountings and U-adapters. In 1952 the Mercs switched to the late 8BA type pumps just like the Fords had.

If those pumps are in good condition with respect to corrosion and erosion, they are getting more valuable as cores to the Merc folks. No one reproduces them so you should be able to peddle them on flea-pay or in the swap section pretty easy.

06-23-2015, 12:37 PM	#1
sunshine Senior Member Join Date: Feb 2011 Location: SUNSHINE MD. Posts: 318	Unknown Water Pumps ???? I have this set of water pumps , that dont look like any others I have. The # s on them are OCM 8503 and OCM 8504 SINGLE PULLEY. any help . THANK YOU SUNSHINE

06-23-2015, 12:43 PM	#2
toby Senior Member Join Date: May 2010 Location: Racine, WI Posts: 472	Re: Unknown Water Pumps ???? Mercury 1950-51 OCM 8504 LH OCM 8503 RH

06-23-2015, 12:46 PM	#3
51504bat Senior Member Join Date: Sep 2013 Location: SoCal-Redlands Posts: 3,020	Re: Unknown Water Pumps ???? Merc pumps. Early (49-50 or so) were wide belts and the later Merc (51-53 or so) narrow belts. Very similar in appearance to 8rt truck pumps but the mounting pad is at a different height. The Mercs used a u shaped spacer between the front mount and the pump. __________________ Making the simple complicated for over 30 years.

06-23-2015, 05:02 PM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: Unknown Water Pumps ???? Sponsored Links (Register now to hide all advertisements) The 49 had different engine mounting than the 50 & 51. The 49 still had the wide belts with the early style fan that had the oil reservoir. In 1950 (0CM) the pumps were changed to narrow belt with the puck style engine mountings and U-adapters. In 1952 the Mercs switched to the late 8BA type pumps just like the Fords had. If those pumps are in good condition with respect to corrosion and erosion, they are getting more valuable as cores to the Merc folks. No one reproduces them so you should be able to peddle them on flea-pay or in the swap section pretty easy.