| Brand Name | SeaSummer | SKU | 0185-Si-0019 |
| ID | 1.125" | Pulley | |
| Rotation | Belt | ||
| Bolt Torque | Maximum Engine RPM | 3,600 RPM | |
| Voltage Insulation | 1000V | Temperature | Up to 370°F (188°C) |
| Net Weight | 5kg | Carton Dimensions | 68 x 46 x 26 cm |
| MOQ | 100pcs | Customized Services | OEM |
| Delivery Time | 30 days, volume-dependent | Packaging | Cardboard packaging |
Products Description
Lawn Mower Tractor PTO Clutch Grasshopper 721 721D 721D2 388769 -Free Bearing Upgrade 1.125" ID
This newly upgraded PTO clutch assembly is professionally engineered as a premium aftermarket replacement solution for Grasshopper commercial zero-turn mowers, covering multi-generation zero-turn models and cross-brand turf equipment. Different from ordinary standard clutches on the market, this 388769 model focuses on bearing durability and high-temperature electrical stability, solving long-standing weak points of original factory clutches during long-period commercial mowing operations.
Built with a precision 1.125-inch inner bore, this clutch perfectly matches the original crankshaft installation standard of Grasshopper zero-turn machines. It supports a maximum engine operating speed of 3600 RPM, fully adapting to high-load and high-frequency working scenarios of commercial lawn trimming. Equipped with 1000V high-grade insulation protection, the internal electromagnetic coil effectively avoids electrical aging, leakage and breakdown risks under extreme temperature environments. It can continuously work stably in high-temperature environments up to 370°F (188°C), greatly improving the overall operational safety and service life of the equipment.
| Grasshopper | Model 618 |
| Grasshopper | Model 620 |
| Grasshopper | Model 620T |
| Grasshopper | Model 718K |
| Grasshopper | Model 720K |
| Grasshopper | Model 721D |
| Grasshopper | Model 721D2 |
| Grasshopper | Model 721DH2 |
| Grasshopper | Model 721DT |
| Grasshopper | Model 721DVB |
| Grasshopper | Model 721G2 |
| Grasshopper | Model 722D2 2003-08 |
| Grasshopper | Model 722DT6 |
| Grasshopper | Model 723KH2 |
| Grasshopper | Model 725 |
Replacement Numbers
| Craftsman | 35520 |
| Craftsman | 58925 |
| Craftsman | 7058925 |
| Craftsman | 7058925YP |
| Grasshopper | 71379 |
| Grasshopper | 73111 |
| Grasshopper | 388767 |
| Grasshopper | 388769 |
| Grasshopper | 606242 |
| Kees | 7058925 |
| Massey Ferguson | 58925 |
| Massey Ferguson | 7058925 |
| McCulloch | 58925 |
| McCulloch | 7058925 |
| Snapper | 35520 |
Products Advantages
Why Choose Our Electric PTO Clutch over Generic Replacements?
Our Solution:
Reinforced Upgraded Bearing Assembly, Anti-Wear & Anti-Seize
Aiming at the common failure problem of easy bearing damage of traditional clutches, this product adopts upgraded high-precision bearings and enhanced multi-layer sealing structure. It is filled with high-temperature resistant special lubricating grease, which can resist the erosion of lawn debris, dust and humid air for a long time. It effectively avoids bearing dry friction, jamming and abnormal noise caused by environmental pollution, and significantly improves the durability of the clutch under long-term continuous operation.
02 1000V High Insulation Coil, Strong Anti-Aging Ability
The built-in electromagnetic coil adopts high-purity copper winding and high-strength insulating glue encapsulation process, with a 1000V professional insulation level. Compared with ordinary clutches, it has stronger electrical breakdown resistance. Even under continuous high-temperature working conditions of 370°F, it can maintain stable electromagnetic adsorption force, prevent coil short circuit, burnout and intermittent power failure, and ensure consistent and reliable blade power output.
03 High-Speed Adaptability, Stable Power Output
Calibrated strictly according to the maximum 3600 RPM operating standard of commercial mowers, this clutch maintains excellent dynamic balance during high-speed operation. It can buffer the instantaneous impact force generated by frequent clutch engagement and disengagement, avoid power slipping and cutting speed attenuation, ensure uniform and flat lawn trimming effect, and effectively protect engine crankshaft and transmission components from impact damage.
Stable Torque Transmission At Max Engine RPM 3600
Frequent blade engage/disengage cycles create repeated impact loads on the clutch friction surface. Inferior friction materials will glaze and slip after repeated cycling, causing blades to lose rotational speed and produce uneven cutting results. Our high endurance friction composite keeps consistent torque delivery even at maximum 3,600 RPM engine speed. It softens the shock during power switching, protecting spindles, belts and engine crankshaft from accelerated fatigue damage.
Quality and Craftsmanship Details
Products Package
About Us
Our company is a professional cross-border supplier focusing on the research, development and sales of aftermarket replacement parts for outdoor power equipment. The company has long been committed to providing high-quality, durable and cost-effective supporting accessories for global lawn and garden machinery maintenance markets. The main product line covers all kinds of electromagnetic PTO clutches, mower deck accessories and small engine replacement parts, which are widely compatible with mainstream garden machinery brands in North America, Europe and Latin America.
We adhere to strict raw material screening and standardized production processes, and every batch of products has passed professional performance testing and aging verification. We can provide stable bulk supply, emergency small-batch replenishment and personalized OEM brand customization services according to customer needs. With professional technical support and perfect after-sales system, we help global distributors and maintenance stores optimize procurement costs and improve product competitiveness.
Trusted Partnership Power
YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
Production process
Quality control
Expo experience
Customer Reviews
FAQ
Q: What OEM part numbers and lawn equipment does this PTO clutch replace?
A:This electromagnetic PTO clutch is a direct aftermarket substitute for Grasshopper OEM #388769. It works with multiple Grasshopper zero-turn mower series such as the 721,721D,721D2,725,727K2 and 729 models. It also fits certain Snapper Pro and Woods front discharge mower units. The assembly features a 1.125" shaft bore. We strongly recommend matching your old clutch OEM part number and mower model prior to checkout. Send us your machine specs, and our technical team will double-check fitment for you.
Q: Can you provide personalized OEM customization and branded packaging services?
A: Yes, we support comprehensive OEM customization services for bulk orders. We can print exclusive customer brand logos on the clutch surface, customize outer carton styles and labeling contents according to customer requirements. At the same time, we also support customized development and production of products according to customer samples or technical drawings to meet the personalized market layout needs of different buyers.
Q: What is the mass production cycle and delivery arrangement of the product?
A:Our conventional mass production cycle for this clutch is 30 working days, and the specific delivery time will be dynamically adjusted according to the customer's final order quantity and production schedule. For customers with urgent seasonal supply needs, we can check the real-time inventory and production capacity, and prioritize scheduling to meet peak market replenishment needs.
Q: What quality testing procedures will the clutch pass before leaving the factory?
A: All finished clutches will undergo a full range of professional tests, including coil insulation detection, resistance value calibration, dynamic engagement stability test, high-speed operation noise detection and overall dimension calibration. In addition, we will conduct random sampling of each batch of products for high-temperature aging endurance tests to simulate long-hour outdoor working conditions, ensuring that the products can maintain stable and efficient working performance in complex and harsh environments.
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