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4000 PSI @ 4.0 GPM Horizontal Gas Engine Triplex Plunger Replacement Pressure Washer Pump

Marsoni M251S
Sale price$806.05
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Get it in 3 business days with 1 day shipping. Friday, May 29
4000 PSI @ 4.0 GPM Horizontal Gas Engine Triplex Plunger Replacement Pressure Washer PumpAnnovi Reverberi AR XWAM4G40N horizontal gas engine triplex plunger pump is rated up to 4 GPM at max 4000 PSI spins a 24mm solid shaft at 1750 RPM using a 3 4F inlet and 3 8"F discharge thread. N version with a gas engine flange. Max GPM 4 Max L Min 15 Max PSI 4000 MaxBar 275 Power EBHP 11 Bore Dia mm 20 Stroke mm 10 Crankshaft ID Stamp 6 Inlet 3 4" F Outlet 3 8" F Max Temp 140 F Oil Capacity (oz) 32 Weight 34 RPM 1750 Shaft Size 24mm Shaft Version N
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4.0 ★★★★★
Based on 2149 reviews
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Britincali
Cuba, US
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
A
Verified Purchase
ANDRES FIGUEROA
Grantham, US
★★★★★ 5
Very good
The best quality. Runs like new again.
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Reviewed in the United States on March 12, 2026
A
Verified Purchase
Ale
Grantham, US
★★★★★ 1
garbage spark plugs
misfired after 30 minutes of driving cylinder 4 misfire code, left me stranded on the highway with baby in car. “(9621)” at the end of description is a lie, was not compatible with my vehicle even with compatibility test.
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Reviewed in the United States on May 17, 2026
A
Verified Purchase
Aspen Valdez
Boise, US
★★★★★ 5
Fits 2011 335xi n55 prefect
Fits my 2011 335xi n55 engine perfectly. Comes on and off easily and gets the filter loose quickly. Amazing quality
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Reviewed in the United States on March 15, 2026
C
Verified Purchase
Clint
Charlottesville, US
★★★★★ 5
Works perfect for BMW S63 engine.
I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).
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Reviewed in the United States on September 8, 2025

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