Official Jacobsen rear-engine riding mower parts

Jacobsen rear-engine riding mower common replacement parts

• Seat switch. The seat switch recognizes whether you are sitting on the seat. If the seat switch doesn't detect you in the seat when you release the brake, the switch kills the engine. To prevent tampering, the seat switch also kills the engine when you release the brake if you unplug the seat switch wire harness.
• Starter motor. The starter motor spins the flywheel to start the engine when you turn the key to the start position.
• Oil filter. An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil or hydraulic oil.
• Idler tension spring. The idler tension spring is used to pull the idler arm back to tighten the belt. The spring will usually connect to the idler arm on one end, and to the frame on the other.
• Ground drive belt. The ground drive belt connects the engine crankshaft to the transaxle pulley to drive the rear wheels.

Fixing your Jacobsen rear-engine riding mower when it's not cutting evenly

If your riding lawn mower is cutting the grass unevenly, start by checking the pattern of the cut. If the cut looks like slanted stair steps, inflate the tires to the manufacturer's recommendation and level the mower deck. If you see alternating stripes of taller and shorter turf, slow down while mowing-mowing too fast can cause those stripes. If slowing down doesn't fix the stripes, sharpen or replace the mower blades. Sharpening or replacing the mower blades is also the answer if grass tips look ragged or tattered instead of cleanly cut.

Blade vibration also causes an uneven cut. To eliminate vibration, replace unbalanced blades and worn mandrels. Replace a worn blade belt because a worn belt won't spin the blades correctly. Worn deck idler pulleys can also cause vibration, so replace any deck pulleys that don't spin freely. Check the mower deck for damage and replace the deck if it's bent. Finally, tune up the mower engine if it doesn't run smoothly when mowing.