Exhaust Valve Sticking? - Only Cub Cadets

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Exhaust Valve Sticking?

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09-22-2009, 02:01 PM

jfinney

Senior Member

Join Date: Mar 2009

Location: PA

Posts: 263

Exhaust Valve Sticking (updated with photos)?

My 73 starts easy and runs well for the most part. However, when I am cutting grass after about 30-40 minutes the RPMs will dramatically drop until I either clutch the tractor, or disengage the deck blades. Then the RPMs will pick up again. If I attempt to cut grass again, it will do the same thing. A friend said he thought the exhaust valve might be sticking when it heats up. Could this be right? If so, is there something I can do to repair it, or am I looking at replacing the exhaust valve? If I do need to repair or replace it, are there any special tools that would be needed? Tractor runs fine unless it has the deck running. Thanks,
Jason

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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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