Briggs & Stratton RIDER 13 manual Stop and let the transmission cool down. Clean the cooling fins

Engine slows with heavy load

Abnormal noise in transmis- sion

Defective engine

Defective transmission

Drive belt

Hydrostatic transmission’s cooling fan

Pulley on hydrostatic transmission’s input shaft

Hydrostatic transmission

Bypass valve

Engine speed drops

Drive belt for transverse axle

Transmission overheated

Oil level too low

Check the belt tensioning mechanism

Worn belt

Damaged impeller or runs against foreign object

Pulley loose or damaged

Oil level too low

Blocked oil filter

The valve’s nozzle in wrong position

Repair the engine

Belt worn or oily

Clean or replace the belt

Adjust the belt

Stop and let the transmission cool down. Clean the cooling fins.

Fill engine oil SAE 10W/30 to correct level

Lubricate the bearing or replace the belt adjuster

Replace the belt

Clean or replace the fan

Tighten or change the pulley

Fill engine oil SAE 10W/30 to correct level

Change the oil filter

Repair

The hydrostatic transmission must not be opened during the warranty period.