HighTide
New member
Recently bought and installed a second PW (coldwater) and have run it for 40 hours already. Like my main skid, it is also a Vanguard 18 hp. I have run my main unit now for 3 1/2 years and it has maybe backfired 3 or 4 times total that I can remember. My new one backfires 2 or 3 times a day but performs perfectly while running. The new one has a throttle on it and the old one does not -- does that make a difference? I have not used my throttle on my new unit yet as left in full throttle keeps it running right at 3400 rpm on my TinyTach. The majority of the time, my new unit will backfire approximately 5 seconds after engine is shut off. Is there some sort of adjustment I need to make and is this bad for the engine or muffler? Thanks for any advice as I am tired of alarming the neighbors with a gunshot like pop!