Welcome to QKPARTS.We provide 100% perfect customer service, please contact us if you have ANY question!Premium 4.0KW to 6.5KW Generator Automatic Voltage Regulator(AVR) for Brush Alternator, especially designed & developed for use with portable generators powered by China-made diesel engine 186F or gasoline engines 173F(242CC/8.0HP), 177F(270CC/9.0HP), 182F(337CC/11.0HP), 188F(389CC/13HP). It works great as well for a generator of 3KW to 4KW powered by China-made 178F diesel engine. Alternator Rear Cover/Stand & Carbon Brush Assembly NOT Included, and Sold Separately.Part Number:AVR-4565B. It is also compatible with the following parts number: 6800S312, AVR-C5KW, AVR3-5KW, AVR5-1F & AVR-CD294.Built-in Full-Wave Output Bridge Rectification.Voltage Output Increase with Loading.Large Manual Adjustable Voltage Output Range of 160V ~ 260V for 240V output.Maximum Output: DC 90V 3.5A.Excitation Voltage: 90V ~ 100V.Feedback Voltage: 14V ~ 24V with an Average of 18V(Sampling Voltage).Frequency: 50/60Hz.AC Voltage Output: 120V/240V.Auto Voltage Adjusting Accuracy: ≤ 1%.Maximum Temperature Rise: 130C or 266F.Continuous Working Time: ≥ 20 Hours.Installation-Center Distance: 140 1mm (about 5.5 in).Packing including: 1 X AVR-4565B. Free Shipping :Our inventory is stocked & ready to be shipped from KY, USA.Highly appreciated your order and hoping you have a best buying experience in our store.