The original KOSHIN Japan Ltd. MF-40SRL impeller is designed for Japanese marine KOSHIN MF(C)-40S and MF-40MS pumps. With the help of spare parts and instructions, you can easily replace the impeller on your pump yourself. A replacement of the impeller is recommended regularly once a year or when the vacuum performance of the pump is impaired. For example, if the suction lasts longer than 30 seconds
All included accessories are not a cheap Asian copy. Impeller material made of MC97/EPDM. These NEOPRENE WHEELS are used only for ENGINE COOLING and for transporting fresh or salt water. Neoprene is the most commonly used material and is suitable for use where only small amounts of oil or diesel fuel are present.
Specifications:
Number of sheets: 9
Outer Diameter 3.74" (95mm)
Inner diameter 25mm
Splined shafts and width 2.48" (63 mm)
Replaced:
-Johnson pump (SPX FLOW): 09-1029B
-Jabsco #: 836-0001
- Vetus: IMP00901
-Volvo Penta: 875660, 875736, 807904, 804696, 825942, 897055, 875808-8, 21730344
- Yanmar: 127881-42050
-Kashiyama: SP200, SP220
-MPN:RM836-0001
-JMP: 8000-01
-NIKKISO: F40CBC
-Ancor: J050005
-CEF: 500105
-DJ: 003-0901
Flexible impeller marine pumps offer an efficient solution to most raw and salt water pumping needs. The pumps are self-priming and can pass relatively large solids without clogging or damaging the pumps. Johnson engine cooling pumps are designed to meet the needs of the world's leading marine engine manufacturers, and it's not just because of our renowned pumps.
The main advantage of a flexible impeller pump is its self-priming ability. When the impeller blades are depressed and rebound, they create their own vacuum, which draws fluid into the pump.
 
Koshin Rubber impeller
Suitable for:
"REVOLVEX PUMP" & "RUBBER MASTER" Selfpriming KOSHIN pumps MF-40S, MFC-40S for seawater
 
PUMPS APLICATIONS:
-To wash the deck with sea water.
-To drain the hold of a sea vessel.
-For emergency drainage of ships.
-For the water supply of the sea vessel and drainage of the tanks.
 
 
•Complete stucture is manufactured from gunmetal, no rusting. 
• MFC Series is fitted with electromagnetic clutch. 
• Easy to replace rubber impeller.
• Pumping up Seaweed at once and transferring it without damage. (MFC-80S)
• For cooling engine.
 
Guarantees 3m suction lift with self-priming.
 
Dry prime pump, no need to prime with water, immediate suction
for Seawater made in Japan by KOSHIN Ltd.
 
 
Note: KOSHIN marine Pumps and marine spare parts have the original Japanese Quality  for aggressive salt in marine usage. Be care about Chinese fakes not suitable for seawater!