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Maruyama MSD41 Piston Pump

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The Maruyama model MSD41 is a 3/4 direct drive piston pump that sets to deliver a consistent and reliable application.

For Use In

Residential Commercial and Industrial Sites


Maruyama MSD41 Piston Pump - 3/4 Part#: 354051

3 chrome-coated cylinders; includes pressure relief valve & base mounting kit.

Drive: Direct

Number of Cylinders: 3

Cylinder Coating: Chrome

Pressure - Max.: 570 psi

Suction Volume: 8.0 gpm

Flow Range: 6.0 gpm - 40 gpm

Required Power: 4 hp

Weight - Approx: 12.5 lbs

Active Ingredient

It is constructed of chemical-resistant aluminum with modular design to ensure a simple and worry-free repair and maintenance.

How To

It uses uniflow technology which achieves 6 GPM and 570 PSI and it requires less horsepower on its peak performance and lessens the consumption of fuel.

Maruyama MSD41 Piston Pump

Product Q & A

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Browse 4 questions Browse 4 questions and 4 answers
I have the same issue with milky oil I have cleaned and cleaned even gone so far as to put the pump in a dry room for a couple of days oil still turns milky after about 30 uses?
Jason B on Jul 9, 2018
BEST ANSWER: Yes this is common to happen with the pump any type of condensation can cause the oil to turn a milky color. The only thing that we can do is make sure to change the oil out. When clearing the old oil out keep the stopper off and run a bit of oil to wash down condensation before closing it up and filling with new oil.
Will this pump hook up to a predator 212?
A shopper on May 6, 2018
BEST ANSWER: Yes as long as the shaft size on the engine is 3/4"
Fluid in MSDI pump is milky. and I want to change it. What is it, 10w40 oil, hydraulic oil, compressor motor oil?
Michael B on Apr 15, 2018
BEST ANSWER: SAE30 a non-detergent oil this can be found at any auto part store. When changing the oil you can run a bit of new oil through before closing the cap. This will help you get all of the milky liquid and any condensation out before refilling with new oil.
I am trying to mount the Maruyama MSD41 to a Honda 160. After removing gear reduction unit the crankshaft is splined. How do I adapt to 3/4 in keyed input of pump?
greg L on Feb 27, 2018
BEST ANSWER: The Maruyama would not be compatible with the Honda 160. We use the Maruyama with the Honda GX. Unfortunately, the Honda 160 would not have an adaptor to connect.

Customer Reviews

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Overall look great,shipped and arrived on time,have had a chance to check it out. Thank you!
December 28, 2017
7 months ago

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