JPR-YM08IH JMP Marine Yanmar Replacement Engine Cooling Pump

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: Engine Cooling Pumps

Regular price $264.52


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  • JMP Yanmar Replacement Engine Cooling Pump #JPR-YM08IH
    QTY: 1
  • Steel Pulley & Mounting Bracket

What is the internal difference between JPR-YM08IH and model JPR-YM08IH2?
The difference is the thickness of the machined "Cam" which is incorporated or part of the Body / Casing itself. The machined thickness of YM08IH is greater (4mm) vs a smaller thickness (2mm) found in the JPR-YM08IH2, so the JPR-YM08IH model will give a higher flow rate vs JPR-YM08IH2. This is why it is very important to order the correct pump for your model of the engine by referring to the cross-reference information provided.

You can also use JPR-YM08IH for the replacement of Yanmar 121575-42000 (replaced by 721575-42702), which is the pump with the NPT threaded nipple port design, but you MUST make sure that you have the rubber hose for the inlet and outlet for the JPR-YM08IH hose connections.

How to Install Mounting Bracket on Pump?
The mounting bracket does not come pre-installed on the pump; if you are using this bracket for your application you can find the step-by-step installation instructions by going the Blog Page Post "How to Install Mounting Bracket on JMP Marine Yanmar Replacement Engine Cooling Pumps JPR-YM08IH & JPR-YM08IH2"

Product Information:

Port Size (Inside Diameter)
1/2" HOSE
Port Size (Outside Diameter) Approx 3/4" HOSE
Uses JMP Impeller p/n
7050-01 (search 7050-01K)
Pump Size (LxWxH,mm) 91 x 114 x 76
Pump Weight (approx) 4.0 lbs (1.82 kgs)
Replaces Genuine Yanmar Pump p/n(s)  Yanmar 128397-42500, 128990-42500
Engine Model(s):
2GMF, 3GMF, 2YM, 3YM
Replaces Johnson Pump p/n(s)
Johnson 10-24509-01, 10-13337-01, F4B-903
Parts Internally Compatible to Genuine NO (Internal Changes made for better performance & Reliability) 
Changes Made to Pump Mechanical Seal, Ball Bearing, Shaft, Machined Steel Pulley (Washer & Nut Included) 
Major Service Kit (All Internal Parts)
*Sold Separately
JSK0082 (For JPR-YM08IH Only)
Minor Service Kit
*Sold Separately
JSM0091 (For JPR-YM08IH Only)


  • Plug & Play Replacement
  • Simple & Compact Design (Less Parts)
  • Strong Bronze Body (Heavy Duty Marine Grade Casting)
  • High Performance and Long Life Flexible Impellers
  • Marine Grade Shaft (3X Series Non-Magnetic)
  • Mechanical Seal instead of Lip Seal
  • Heavy Duty Machined Steel Pulley
  • Cam-Less Design / Cam is machined in the Body Casing.

Orders of $500 or more gets free standard delivery.

  • Standard delivered 4-5 Business Days
  • Express delivered 2-4 Business Days

Orders are processed and delivered Monday-Friday (excluding public holidays)

JPR-YM08IH JMP Marine Yanmar Replacement Engine Cooling Pump

Regular price $264.52