Gearbox Input Oil Seal 650838 05-002 156005 Compatible with 40HP 50HP Worksaver Rotary Cutter King Cutter Review

Here is a head-to-head comparison of these two lawn mower components.

Quick Verdict

There is no winner overall because these are not complete lawn mowers—they are incompatible parts (a tractor gearbox seal vs. a mower tire tube)—so the choice depends entirely on whether you need to fix a rotary cutter’s gearbox or replace a flat tire on a riding mower.

Side-by-Side Comparison

Where Gearbox Wins

1. Critical repair for heavy-duty mowing equipment – If you own a 40-50HP Worksaver or King Cutter rotary cutter, this oil seal is a direct replacement for OEM part 650838/05-002/156005. A failed seal causes gearbox oil leaks, leading to gear damage. At $8.50, it is a low-cost fix that can save a $500+ gearbox.
2. Perfect 5.0-star rating (albeit only 3 reviews) – Buyers report it fits exactly and stops leaks. For a niche, specific tractor part, this high satisfaction suggests it works as advertised.
3. Single-use, no guesswork – You buy one seal, install it, and the gearbox is sealed again. No need to match tire sizes or valve stem types—just confirm it fits your gearbox shaft diameter.

Where AR-PRO Wins

1. Universal fit for millions of lawn mowers – The 15x6.00-6 tire tube with TR-13 straight valve stem is one of the most common sizes for riding mowers, zero-turn mowers, wheelbarrows, and ATVs. It fits thousands of models from John Deere, Craftsman, Husqvarna, Cub Cadet, and more.
2. Overwhelming real-world proof – With 20,211 ratings and a 4.3-star average, this is a proven, mass-market product. Buyers consistently report it works, holds air, and is easy to install. The two-pack provides a spare or allows you to replace both rear tires.
3. Better value per unit – At $12.79 for two tubes (≈$6.40 each), it is cheaper than most brand-name tubes at hardware stores. You get a reliable replacement that solves flats without buying a whole new tire.

Which Should You Buy?

• Buy Mower A (Gearbox Seal) if: You own a 40-50HP Worksaver, King Cutter, or similar rotary cutter that is leaking oil from the gearbox input shaft. This is a precise, cheap fix for a specific mechanical problem—do not buy it for a lawn mower tire.

• Buy Mower B (AR-PRO Tire Tubes) if: You have a riding lawn mower, zero-turn, wheelbarrow, or ATV with 15x6.00-6 tires that has a flat or slow leak. The two-pack gives you a spare, and the TR-13 valve stem fits standard tire rims. This is the everyday choice for lawn care maintenance.

• Buy Neither if: You are shopping for a complete lawn mower. These are parts, not mowers. Instead, look for a gas/electric mower with a deck width matching your yard size (e.g., 21-inch for small yards, 42-54 inches for large yards).

Here is a head-to-head comparison of these two lawn mower components, keeping in mind that neither is a complete mower—they are replacement parts for different machines.

Quick Verdict

Neither mower wins overall because they are incompatible components for completely different machines: Mower A is a small replacement seal for a heavy-duty rotary cutter gearbox, while Mower B is a high-volume oil filter for a standard lawn tractor engine.

Side-by-Side Comparison

Where Gearbox Wins

1. Extreme durability application – This seal is designed for high-torque, low-RPM gearboxes used in heavy brush cutting and pasture mowing, where standard mower engines would fail. It withstands constant mud, dust, and impact.
2. Specific repair solution – If you own a Worksaver, King Cutter, or similar 40–50 HP rotary cutter with a leaking input shaft, this $8.50 part is the exact fix—no adaptation needed.
3. Niche value – At less than $9, it solves a specialized problem that would otherwise require replacing an entire gearbox ($200–$500). The 5.0 rating (though from only 3 reviews) suggests it works perfectly for that tiny audience.

Where Briggs Wins

1. Massive proven reliability – With 15,496 reviews and a 4.8-star average, this is one of the most trusted small-engine oil filters ever made. It fits hundreds of Briggs & Stratton engines (Intek, Vanguard, etc.).
2. Universal application – This filter works on countless lawn tractors, zero-turn mowers, and generators. You can buy it for a 15-year-old Craftsman or a brand-new John Deere with a Briggs engine.
3. Critical maintenance item – An oil filter change is required every 50–100 hours of mowing. This part directly extends engine life, while the gearbox seal is only needed when failure occurs.

Which Should You Buy?

Buy Mower A (Gearbox Seal) if: You own a heavy-duty rotary cutter (40–50 HP range) and the input shaft seal is leaking oil. You are comfortable disassembling the gearbox to replace a $8.50 seal rather than buying a new $300 unit. This is the correct choice for exactly that one repair job.

Buy Mower B (Briggs Oil Filter) if: You own any lawn tractor, zero-turn, or garden tractor powered by a Briggs & Stratton engine that requires the 492932S filter (most single-cylinder and V-twin models from 2000–present). You need a routine oil change part that is guaranteed to fit, has been verified by tens of thousands of users, and costs only $0.80 more than the generic seal.

Buy neither if: You are looking for a complete lawn mower. Both items are replacement parts—not mowers. If you need an actual mower for your yard, look for a complete machine with a Briggs engine (which would use Mower B’s filter) or a heavy-duty tractor with a PTO-driven rotary cutter (which would use Mower A’s seal).