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#11
06-22-2023, 04:14 PM
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Found the below in Briggs' Engine Alternator Replacement Guide: https://www.briggsandstratton.com/co...eplacement.pdf
This explains why there are different charging parts options for this engine model. I might try swapping the diode rectifier for a regulator rectifier to see if that makes any difference. I'm thinking that because the diode continues to throw voltage at the battery (and ramps up voltage as the battery hits the "full" point) to 16V DC and then trips my voltage relay that maybe a regulated system will keep that voltage constant and not trip the relay?? Thoughts? I must have the 5 amp system since my engine is putting out 28-30V AC. So I know which regulator-rectifier I will need. - thanks! 
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#12
06-22-2023, 10:39 PM
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I may have figured this out. If you recall from my first message in this thread I commented that the issue of the voltage relay kicking out seems to be weather-related:
- Hot weather = relay kicks out frequently, up to every few minutes - Cold weather = runs fine, relay never kicks out So, I wondered if the problem is NOT related to the charging system but possibly the relay itself that is failing, affected by hot weather. Today was a good day to try an experiment since it was 92F. I strapped the relay to a cold pack (see photo below) and went off mowing. Mowed for about an hour and had no issues with the relay kicking out, which also shuts off the electric clutch and stops the mower until the relay resets, but then kicks out more frequently between cycles. Afterwards I performed the same test that was always a surefire way of making the relay kick out: Tractor in park, running at WOT. As stated earlier in this thread, a diode rectifier will slowly increase DC voltage when the battery approaches "fullness". At that point is when the relay would always kick out. This time it did not! I ran the engine and saw voltage increase slowly to 15.6V DC. It held there for 10 minutes or so with no issues until I finally shut down the engine. So, I think I am going to try a new relay and see what happens.
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#13
06-27-2023, 10:55 PM
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Update: My new voltage relay (or circuit breaker depending on what parts site you look at - see #3 below) arrived today. I tested the old one first and had the same issues when performing the procedures described earlier. I swapped out the old for the new and - success! Everything is now working as it should; it was the voltage relay all along and nothing else to do with the charging system.
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