That's the experience I've had with idlers . The stronger spring may have actually made the condition worse. Kill the engine with the pto engaged then take a look at the idler position to see if that sheave is parallel with the stationary pulleys .
Previously mentioned , the mower is being ask to do a job it wasn't designed to do .
This pic of blade overlap is difficult to see , but if blade overlap is sufficient a straight line can't be drawn parallel to the tractor length when any 2 adjacent blades are at 90° to the tractor . That's he...
I've seen a few things from both schools of thought and i oil / grease .
Being there is dirt not seen on dry fittings i grease / oil because i prefer lubricated dirt opposed to dry dirt .
A lawn tractor as an example . Steering rack / pinion bearing and sector gear . I've nearly mastered but...
Mow about 10 minutes and shut the engine off to check bearing housing temperature by feel . If a bearing is bad , the temperature of that housing will be above the others .
Occasionally a grass build up of clippings will cause a odd sound.
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Note :
The vise angle is maneuvered by allowing the base to partially rest on a piece of wood the thickness necessary and positioned to achieve the 30 degrees tilt so the grinder can be held level at the top . The wood in the jaws depicts a 1/4 hick blade .
When a blade needs sharpened i'll...
If you have a extra vise , to hold the RT. Angle grinder level and get the desired angle by shimming the vise base . This takes all the guess work from the blade angle .
With 500 hrs on a home owner battery it's time for a new battery and by al means clean the battery cable ends of oxidation until you see the metal shine .
Pay someone to mow it this time with equipment rated for that type of mowing . Now you know this isn't a enjinerreng site and the answer you be looking for may not be available .
Be prepared with the removal tools needed then heat the case about an inch or two circle around from the plug . Here's the important part . Only raise the Al temperature 10 - 20 degrees . We need to be careful how much and where to heat because heating the plug to be is counter productive ...
I agree with KISS , and it just doesn't get any better than this .
I can understand a repair business having the best fastest / equipment , but me as a DIY-er I'm not concerned about time . Concerned about a complete drain ? Pull the plug in the AM because it drained to the sump all night and...