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The nuts on each side of the flywheel keep coming loose

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StarTrac NXT Chain Tensioning & Alignment Video


About This Video


Adjusting Chain Tension and Alignment on a StarTrac NXT


  • In this video, we show how to tension and align the chain and flywheel on a StarTrac NXT bike


  • First you see an example of a chain that is way too loose


  • To correct this loosen the flywheel bolt on both sides of the flywheel


  • Loosen the tension nut on the sprocket side of the bike and tighten the tension bolt until you get the proper deflection on the chain



    • A properly tensioned chain will have roughly 3/16" of deflection




  • Tighten the tension nut and the flywheel nut on both sides as shown in the video


Check the Alignment of the Chain and Sprockets after Making a Chain Tension Adjustment


  • Misaligned chains will look like they are walking from side to side where they enter and leave the sprockets



    • This can cause noise, premature wear, as well as making the chain look to be jumping from side to side during use




  • To correct this, loosen the flywheel nut on both sides of the flywheel, then loosen the tension nut and adjust the tension bolt to move the flywheel in the proper direction needed to align the chain with the flywheel sprocket, as seen in the video



    • Note: If you have already achieved proper tension of the chain, adjusting the tension nut on the opposite side from the sprocket will help to keep the same tension on the chain




  • Don't forget to check the chain tension after making an alignment adjustment




Chain Tensioning Alignment Video for StarTrac NXT Bike

on Feb 11, 2015 | Startrac Fitness Products Star Trac 4410HR...

2 Answers

How to replace flywheel


Most flywheels are on a tapered shaft if no puller is available loosely install the nut as not to damage the shaft and put upward pressure on the flywheel and tap the shaft end. The flywheel should come off

May 05, 2014 | Craftsman Kohler Courage 26 hp 54" Garden...

1 Answer

Passenger side control arm nut keeps comming loose


Install a new nut

Is it not a compressed lock type nut ?

Can only use it so many times

Dec 18, 2012 | Cars & Trucks

1 Answer

ECHO PB251 BLOWER. Noticed fuel running out of muffler. Cleaned spark screen, installed new airfilter, fuel vent, fuel filter. Ran unit - engine quit while at full rpms - will not start. Clicking noise...


Your flywheel has come loose on enj., this throws the timing off so it is firing at all different times except for when it's supposed to. therefore raw fuel is running right through the cylinder and out exhaust, If you are lucky you won't have to replace the 60.00 flywheel! remove fan side of case,and remove blower wheel, then flywheel nut then flywheel, it has a built in key in it, usually this is wasted from coming loose, make sure you use loctite and an impact to tighten flywheel nut back after you repair/replace flywheel.

Dec 04, 2011 | Garden

1 Answer

Need to take off flywheel to change seal. What kind of puller can I use? Any other ideas?


Take loose the nut that holds on the flywheel. Then hold the flywheel with a pair of pliers and lift it off of the workbench, make sure the flywheel nut is even with the top of the crankshaft. As not to damage the crankshaft of the threads. Then lightly strike the nut/crankshaft until the flywheel comes loose. It should only take a couple of taps.

Oct 08, 2010 | Stihl Chainsaw Cutoff Saw Flywheel 08 S...

1 Answer

I am unable remove the flywheel from a craftsman eager-1 mower


Use a large pry bar...your fingers won't do it, neither will a screwdriver (need leverage)...you can use the same nut that holds the flywheel on, just screw it down til the nut is flush with the shaft. You want to be hitting the "shaft' in the center, using the nut to prevent the hammer from damaging the thread. So you want to be hitting the nut & shaft as one surface. Take notice that there is a "key" holding the flywheel in position on the shaft, don't loose it !!

May 27, 2010 | Garden

1 Answer

Bolt comes loose and rip cord is yanked from hand


  1. block off the blade and driver assembly with a 2x4 to keep it from moving
  2. remove the flywheel nut (regular hand force should be sufficient)
  3. tap the 3 holes on the flywheel (if they aren't already threaded) using 1/4inch 20national tap set
  4. remove the flywheel using a flywheel puller -- a harmonic balancer puller which matches the tecumseh bolt pattern on the flywheel also works using 3 1/4inch thread (20national, 2inch long) bolts with washers
  5. NOTE: (if the blade was removed/reinstalled, tighten the blade to manufacturer's spec of 60lbs) before installing the new flywheel key
  6. remove the sheared flywheel key
  7. clean up the flywheel (wipe off all the dirt and grease)
  8. install the new flywheel key (part 611004 for toro 20016)
  9. install the flywheel (pull the bail brake handle to get the ball-brake inside the flywheel)
  10. tighten the flywheel nut to manufacturer's spec of 37.5lbs
  11. prime the gas bulb, give it a pull and mow away

Aug 24, 2009 | Toro Lawn Mower With Toro Power Tools

1 Answer

A fairley loud knock in the motor


Loud knock in the lower end? Well don't start it again! You're going to chew up the crankpin, and connecting rods. Camshaft bearings? No, doubtful. You have a Loud knock.

Possible causes:
1.Bad oil pump.

2.Crankpin was faulty from factory. Oil hole in crankpin wasn't chamfered from the factory. (Doubtful), or surface of crankpin wasn't hardened to the proper depth. (.010)

3.The Harley crankshaft is composed of three Main pieces. Left Flywheel, Crankpin, and Right Flywheel. Looks like two narrow wheels with an axle off to one side.

At either end of the crankpin are threads. There is also a key, in a keyway, on each end. Each end of the crankpin is tapered. Each flywheel has a keyway cut into it's tapered center hole, and this fits over the key on the crankpin's tapered end.

There is a half moon looking lock device. This screws to the outside of the flywheel, and goes around the nut, that is on the threaded end of the crankpin. This locking device keeps the nut from coming loose.

Perhaps the screw backed out, and the nut is loose. (On one side, or maybe both sides. Pretty rare for both sides)

4.Oil wasn't changed at the specified interval, or the interval rate went up, due to road conditions. (Dusty roads, or sandy)

5.Oil filter wasn't changed when oil was changed.

Aug 19, 2009 | 2004 Harley Davidson FLSTC - FLSTCI...

1 Answer

The flywheel pin needs replacing on 3.5hp briggs and strat.engine


Take off the top sheet metal , there should be a nut & spring washer that will have to come off, they will be tight. Put the nut back on a few threads, use a prybar to put some upward pressure on the flywheel at the keyway side, while hitting down on the nut with a block of wood & large hammer. This should pop the flywheel loose from the taper shaft, replace drive key with ALUMINUM key!!

An impact wrench is sometimes necessary to get the nut loose.

Apr 01, 2009 | Garden

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