Mower has new belts and has been serviced. Still after mowing for 10 or 15 minutes it slows to a crawl. everything else is working fine. If I let sit for 30 minutes and start same thing.
Does the motor rpms slow down or the mower speed?
SOURCE: Poulan Pro model 185H42ST dies after 30-45 minutes mowing
Put a carb kit in it. If that does not work replace the gas cap they are supposed to breath and if they get clogged it will create a vacuum in the tank starving the engine for fuel.
SOURCE: i need a repair manual for a scotts riding mower.drives a few fee
it could be the axel they have spider gears in them & the teath could be sheared or the the rearend is low on fluid
SOURCE: L111 transmission slips
Is this a hydrostatic transmission if it is check the fluid level. It will really need changing and some are sealed and not to be worked on BUT it is possible to drill a hole in the bottom and top of a sealed unit to change that fluid just don't get any shaving in it. These transmissions must stay clean. The drilled holes must be taped and plugged now you can change that oil just like your car. Don't forget to purge that transmission. By the way they use 20W 50 motor oil.
SOURCE: Swisher 60 deck belt breaks after mowing about 15 minutes.
Even though the routing is correct, have you checked that every spindle and idler pulley turns freely? These bearings can freeze up or bind because debris builds up in them. Also, if the bushings on the idler pulleys can wear, causing them to misalign. Keep checking. Also - is the belt snapping clean, or do you see a burnt, worn spot?
Testimonial: "Thank you for your help. The belt is snapping clean. You are correct in your assessment to what the problem might be. We checked all the above and did not correct problem. We put three washers on top of small idler pulley to bring it down and better align routing. Bought heavier belt at auto parts. Believe the bolt head was touching belt where it routed throught to larger idler pulley."
SOURCE: Mower pto engages when initially started but after
the coil in the electric PTO shorts out when it expands by heat causing it to lose it's magnetic pull and disengages- I hate to say it,but you need a new PTO clutch.
Some self-propelled mowers include a speed control, but sometimes it may seem that no matter how you adjust it, the mower just creeps along at a snail's pace. Most likely this isn't a mechanical malfunction, but an adjustment is probably needed.
Very tall or thick grass can bog down a self-propelled mower, but adjusting the height of the blade may allow it to roll through and cut the grass at normal speeds. If the blade is low, the amount of cutting required may slow down the movement of the entire mower. The frame of the mower may also stick in the high grass. Raise the blade little by little until the mower rolls at the appropriate speed. Going up hills may cause a similar response.
It's possible the drive belt on the mower can slip. Inspect this part to see if it is loose or cracked, and replace the belt to restore power.
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