I bought a Gravely 16G. It has an Onan 16.5 HP CCKa-MS. It runs well and makes good power. The charging system isn’t working. The stator is producing 26 volt AC at the leads. The original 4 wire rectifier/regulator from Onan is no longer available. I have put on a 3 wire 15 amp Kohler regulator and moved it off of the engine and under the hood. The regulator is only producing 6 or 7 volts DC. All the wiring is new and making a clean connection. I’m not sure what to look at next. The stator output is good according to the Onan manual I downloaded. I swapped out the rectifier but got the same result on the DC output. I feel like it must be the stator but the manual said above 17 volts was good. I have continuity between the two stator leads. I do not have continuity between the stator lead and the metal body of the stator. Any of you gear heads have a suggestion?