Answer
Jul 23, 2025 - 09:22 AM
Hmm.. the switch assembly (thermo switch) on a Honda BF90 is a safety component. Typically used to trigger overheat warnings or control the engine's operation under high temperature.
Bypassing it isn’t recommended, because doing so could disable critical overheat protection and risk serious engine damage. However, if you're in a bind and absolutely need to run the motor temporarily, some folks do bypass it by jumping the terminals — but only as a short-term test, not a fix.
If the part’s hard to find, your best bet is to look for a compatible aftermarket replacement or check marine salvage suppliers. Don’t run it long without that switch working — it’s there for a reason ✌🏻
