Reply To: Backfire/misfire thru carb

[Don]

The thermostats have small relief holes in them, so some water always can flow through them…Also, there are two pressure relief valves in there that I’m sure would pop off their seats with pressure from a garden hose…So, if no water passes through the system, something is plugged up….Perhaps the cooling passages in the housing are plugged with sand from being beached or something like that….
How about pulling the hoses off the thermostats and retesting to see if water exits the heads….