


Oil Filter - Spin on - LF3861 - Sparex Part S.73137
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Oil Filter - Spin on - LF3861 - Sparex Part S.73137Oil Filter Spin On LF3861 Sparex Part No. S. 73137 Ensure optimal performance for your machinery with the Fleetguard Oil Filter LF3861. Designed for durability and efficiency, this spin on oil filter is an essential component for maintaining the health of your engine. Product Specifications Overall Height 175mm Outer Diameter 94mm Thread Size 1 12 UNF 2B Filter Type Oil Dome Outside Diameter 93. 47mm Seam Outside Diameter 94. 23mm Reference LF3861
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4.6 ★★★★★
Based on 127 reviews
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Product Reviews
★★★★★ 5
It works!
Size: 16 Fl Oz (Pack of 1), Style: Individual
A short story long---LOL---My zero turn started acting quirky-it would not run at full power and would begin to stall when put under a full load - like trying to mow some taller or thicker grass- never did stall since I would immediately kill the mower but obviously it was not right. I checked and changed the fuel filters-this one has 2 . One in the pick up line in the tank and one is inline just before the fuel pump unit. No help! So, before I dropped the big bucks to have the local farm dealer come and pick it up (at $75 per pickup and return) plus h=whatever shop charges that would result I thought "What the heck, lets give this stuff a try" I gambled $6 . I put in 5 ounces for the 5 gallons tank, and filled it with the gas I had on hand- should have been relatively fresh gas -no more than 2 weeks since pumped . Well, whatever the cause of the issue within about 15 to 30 minutes of low speed running- mostly at idle - the engine seemed to be idling smoothly as opposed to before where it surged but never died, I gave it a try at mowing. YEA!!!! full power and no bogging down - I finished mowing the yard and a part of the pasture (not yet grown up much so it is not requiring the rotary cutter YET) My only guess is perhaps a batch of either old gas or some water in the gas can or mower tank but whatever the cause it fixed it --and all for $6.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2025
★★★★★ 5
Convenient to order from Amazon
Size: 16 Fl Oz (Pack of 1), Style: Individual
Works as expected.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 25, 2026
★★★★★ 4
Good product
Size: 16 Fl Oz (Pack of 1), Style: Individual
Works well for my lawnmower. It's running better after first time using.
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Reviewed in the United States on July 13, 2025
★★★★★ 5
Fuel stabilizer
Size: 16 Fl Oz (Pack of 1), Style: Individual
Great additive
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Reviewed in the United States on January 21, 2026
★★★★★ 5
Keeps the lawn equipment happy.
Size: 16 Fl Oz (Pack of 1), Style: Individual
I use this product in my lawn equipment to keep the carburetors clean.
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Reviewed in the United States on December 23, 2025
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