Electric clutch repair

Hoosier Tree Farmer

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72" Turf Tiger, 35 HP Vanguard engine.
Some rope, suspect belt rope but do not remember this belt going bad and could not get clutch fully disassembled to examine further), got into clutch and caused it to go off balance and burned out. Also burned out PTO switch and voltage regulator. (Still waiting on voltage regulator to see what else was harmed.)
Is there any quick way to block engine rotation to properly torque the new clutch onto the rear of the engine shaft? (A lot of mower parts have to be removed to get to flywheel. One "Youtuber" used a pipe wrench to hold engine, but there is no room, nor access, in the Scag STT to use that shortcut.)

Many thanks to Ill Engine for the air idea. O'Reillys rent/sells/lends a cylinder compression tester that includes everything necessary to load cylinder with air pressure, only had to remove a somewhat hidden air valve. Installed tester, added air and it held well for the 55 ft/lb torque pressure, all done in less than 15 minutes once I found the air valve. Thanks for everyone's comments.
 
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ILENGINE

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Remove a spark plug and stuff the cylinder full of rope. If you have a way of putting air pressure in the cylinder that works to prevent rotation. Will have some sponginess toward bottom of cylinder but as cylinder moves up the air pressure will prevent turning enough to properly torque.
 

StarTech

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If you do this rope trick make sure the cylinder you are using at is TDC compression stroke or possible valve can occur with an OHV engine. There is a good chance of bending a valve or push rod otherwise.

The air will not work either unless you are on a compression stroke.

It would be so easier if all PTOs had a double D adapter. Personally I recommend accessing the flywheel.
 

Rivets

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Are you using an impact gun to loosen the bolt, trying to do by hand is a pain as you’ve found out. Many auto parts stores loan them out.
 
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