Forespar

Forespar Marelon MF 810 Raw Water Strainer - 906066

Item: #865994 | Part Number: 906066
$163.96
or 4 interest-free payments of $40.99

All Forespar threaded plumbing fittings use NPSM threads (National Standard Free-Fitting Straight Mechanical Pipe Thread).

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Description

The Forespar Marelon MF 810 Raw Water Strainer 906066 delivers reliable engine protection with advanced Marelon construction. Approved for below-the-waterline use, it resists corrosion, electrolysis, and temperature extremes while exceeding marine safety standards. A clear lid and removable stainless basket make inspection and cleaning fast and easy.

Image of : Forespar Marelon MF 810 Raw Water Strainer - 906066 Forespar Marelon MF 810 Raw Water Strainer - 906066 Item # 865994

Description

The Forespar MF 810 raw water strainer is made from Marelon, the only synthetic material to be approved by the Marine U.L. Underwriters Laboratories for use below the waterline and has passed the same stringent tests as bronze. It exceeds the ISO standards and is approved by the A.B.Y.C. (American Boat and Yacht Council). Marelon plumbing systems are corrosion and electrolysis resistant and will not freeze or become brittle with age or temperature extremes.

Features:

  • Adjustable universal mounting bracket
  • Clear polycarbonate lid for easy inspection
  • The stainless steel strainer basket can be easily removed for cleaning
  • Intake and exit ports are 1-1/2" NPSM threads standard(reducers available by special order)

Specifications:

  • Diameter: 6.3"
  • Height: 6.1"
  • Flow rate: 40 GPM with 1-1/2" ports NPSM

Notes:

  • Water strainers should be installed a minimum of 12 inches (305 mm) above the static (vessel moored) waterline whenever possible
  • Forespar threaded plumbing fittings, like most true marine plumbing fittings, use NPSM threads (National Standard Free-Fitting Straight Mechanical Pipe Thread). NPT (National Pipe Threads) are tapered, NPSM Threads are parallel. The two types are not designed to work together

Part Numbers for Forespar Marelon MF 810 Raw Water Strainer - 906066

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Questions

I’m confused. The description of this strainer reads that it is approved for use below the waterline; however, the installation instructions call for it to be installed above the waterline. Which one is it?

Asked by: OpenAllNight

What is the pressure rating on this? Most plastic strainers have the issue that if you hook up a garden hose to flush the engine, the strainer cannot take the pressure and fails.

Asked by: Mike
The raw water pump on our engine Universal M35-B, sucks water up through the strainer. There is no positive pressure on the strainer. It is not designed to be pressurized and would leak if you do so. The O-ring will seal at atmospheric pressure and negative pressure (vacuum). The raw water pump would block any attempt to flush out the engine unless the engine is running. You can take the top off the strainer and pour water in the strainer so the raw water pump will suck it through if the engine is running. That is how I run antifreeze through the system to winterize.
Answered by: VermontSailor
Date published: 2025-10-26
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Forespar Marelon MF 810 Raw Water Strainer - 906066
Total:
$163.96