Question about Mtd LAWN MOWER PART # 16998A DECK ASS'Y-21" RD

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Drive belt on my troy bilt 16.5

I put a new belt but when i engage the mower the tractor does not want to pull the tensioner has a spring on it i just wonder if i have hooked in the right place do you think it needs mor tension on it ?

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  • Anonymous Mar 30, 2014

    Belt tensioner spring needs to be replaced

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I do not think you have been sold the proper belt. It sounds like the belt you purchased is too long. check in your owner manual for the proper belt.

Posted on May 15, 2009

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1 Answer

Belt tension troy bilt horse xp 46 lawn tractor


if you just replaced the bearings and now the belt is to loose tells me the belt wasn't put back on correctly. replacing the bearings don't have anything to do with the adjustment of the belt. double check to be sure is is on right Lisa. something isn't right. the tension should come from a spring loaded arm that when engaged it will apply a certain amount of pressure to turn the blades. if disengaged it will seam loose but that is ok. it has to be loose to let the belt slip on the pulleys.

Jun 26, 2016 | Troy Garden

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Need diagram to replace tension spring for drive belt


Go to the manufacturersame website, enter in the the model number and look under diagrams for the pic of your tractor. My troy Bilt has 2 belts, one for the cutting deck and the other is the drive belt. I would replace both as the cutting deck needs to be removed and it's fairly simple and will save you time. It sounds let the drive belt is the reason for the tractor not moving. Hope this helps.

My tractor is a 2007 troy Bilt super bronco with a new fresh installed motor.
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HOW TO REPLACE DRIVE CABLE ON TROY BUILT 12A466MO11


Parts Finder Search Results
46 732-1043 Belt Tension Spring open the above link above and zoom in as much as possible on the diagram. Find part #46, which is the belt tension spring. Now locate it on your mower and look at the whole mechanism , where the pulley is. Check to see if it engages when the cable is put put into drive. Order new parts as needed.

May 20, 2014 | Troy Bilt 5.5hp Self Propelled Mower

1 Answer

How do i adjust the drive belt on my troy belt bilt pony model 37120


most of the time there is no adjustment either replace the belt, replace the spring or shorten the spring ,ive shortened the spring many times and had great results this allows more spring tension to be applied

May 18, 2014 | Garden

1 Answer

Troy-bilt riding mower won't move in forward or reverse


I had a similar problem with my TroyBilt 50 inch zero turn mower. Was cutting grass when it stopped going either forward or backward even though it would start and the PTO would move the cutting blades. Turned out the tensioner spring for the belt that drives the motors near the rear wheels had gone missing. Searched the yard where I had cut and moved the machine but couldn't find it. A new one cost me about $7.50. Put the new one on and it worked fine.

Apr 19, 2013 | Troy Bilt 175HP Manual 42" Riding Mower

1 Answer

I have a troy bilt riding mower blades will not engage in the 1 or 2 deck setting


There is a spring attached to a tensioner that probably came unhooked while changing the belt. Higher deck settings push the deck backwards enough to spin the blades, the lower setting need the spring tensioner to take up the slack in the belt.

Jun 27, 2012 | Troy Garden

1 Answer

I have a troy bilt 42 inch 17 hp lawn tractor. The problem is when I cut grass and i get in some thicker grass the blades turn off then I back out the blades restart. The engine never bogs down


One or more of your drive belts is in need of adjustment or replacement, maybe. Possibly, your electric (or manual) PTO clutch could also be adjusted. You do have the spring tensioner on the deck engaged, right? You say the engine doesn't bog when this happens so I am inclined to think "clutch" and/or "PTO belt" to the deck and/or the "deck tensioner" are the things to check.

The tensioner will be the easiest, it is a handle on the left side ON the deck. Has a BIG spring on it. Make sure it is engaged.

Is yours a Troy Bilt manufactured in Troy New York or is it another manufacturer (MTD?). Troy Bilt is actually out of business, having sold the Troy name to a variety of makers depending on the model line. I don't have the run down on who makes what any more (tillers, chippers, mowers, blowers, trimmers, etc.), but Troy Bilt of Troy, NY is no more. :-(

I have a 16 HP Troy with 42 inch deck driven through a electric clutch. I also have a "grass pump" on my deck. Important maintenance tips: Keep the bearings greased, keep the deck clean underneath. The belt on the deck should have the tensioner released when you are NOT mowing. Keep the blades sharp and in good repair. Mow with engine at full speed. When you get to areas of heavy growth, slow the tractor down (hydro drive) or reduce to a lower gear (gear drive). NEVER adjust speed using the "clutch" (hydro drive or gear drive). When you engage the blades (electric or manual) always have the engine just above idle, bring the engine speed up slowly to preserve the belts and reduce stress on all components.

I am sure this is the fix for your trouble. If there is anything else or if I missed the ball, please let me know and we will go further.

Thanks for your question @ FixYa.com

May 30, 2011 | Troy Garden

1 Answer

I have a troy bilt pony and the drive belt to engage to blades keeps coming off. I have replaced the belt and the pully what else could it be?


well i would take a long look at the spring which holds the tension pulley in place. if it is weak, or not connected correctly, there will be inadequate tension and the belt can come off. I would also take a look at whatever fasteners keep the deck in place as if it is not kept to the rear, there again will be too much play in the deck belt.

Apr 05, 2011 | Troy Bilt 175HP Manual 42" Riding Mower

1 Answer

Have Troy-Bilt lawn tractor (42 in/ 18.5hp), problem is when I put it in forward it does not engage. I think it is the drive belt, which is very loose and worn. Any thoughts


find a small engine repair shop and buy another belt, and a tensioner if it is over 5 years old. Oftentimes it is better to take the old belt with you in case they do not have a listing for your tractor. Before you take anything apart use that cell phone camera for a practical use and lots of pics of the belts. That will save you your next question of how do these belts go back on.

Mar 24, 2011 | Troy Bilt 175HP Manual 42" Riding Mower

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