Take care when testing machine with beltguard removed to avoid loose clothing, jewelery, long hair, etc., from getting caught in rotating parts. Replace beltguard after testing and before operating machine.

• Remove beltguard
• Put machine on a rubber test mat to prevent it from moving
• Start engine and allow it to warm up
• Pull throttle to full speed. Allow the exciter to reach full speed for a few seconds, then return to idle
• Attach tachometer and slowly increase engine speed. Note the engine speed reading when clutch pulley starts to rotate. Correct clutch speed is 2300 ± 100 RPM
• If clutch engagement is below 2000 RPM, check for weak springs. If clutch engagement is over 2200 RPM, clutch may be worn and require replacement, or exciter belt may be binding

Author: David Schatz

David Schatz is the founder of DHS Equipment and a technical content expert in light construction equipment, small engines, and professional-grade replacement parts. With more than 30 years of hands-on experience servicing concrete saws, generators, water pumps, and plate compactors, he helps contractors, rental fleets, and serious DIY users keep their equipment running safely and efficiently.

Through practical, no-nonsense articles, step-by-step guides, and maintenance tips, David focuses on real-world troubleshooting, small engine repair, and clear recommendations on OEM and high-quality aftermarket replacement components that reduce downtime, extend equipment life, and improve job site productivity.