Briggs backfiring

[Canadian_Zuk]

A clean and properly in tune carb is soooo important to small engines, clogged main jets and stuck float needles are very common problems that can usually be avoided with a decent fuel filter. Once at the point of varnish buliding up inside, it's time for a complete tear down and thorough cleaning. Carb overhaul kits are dirt cheap and worth the peace of mind to have on hand.

Every single machine I purchase gets a proper carb job as step number one if there are any running/drivability issues. I have a large heated ultrasonic cleaning tank I use for cleaning everything from complete carburators to handguns and even brass for reloading. Here are a few before and after pic of my 18HP Briggs Vanguard carb from my 1996 Argo. This machine had sat in a barn for a couple years before I picked it up. It was complete but the engine ran a bit different each day lol.

Here are the results of a 30 min dunk.







If any forum members that are somewhat local to me would like, I will give your carb a proper cleaning if you bring it to me. (In Pickering) Free service of course!!

[Rabbit929]

HOD DO U DO THAT?
That sounds like the coolest parts washer ever.

[Countyboy]

Wow. That machine does an incredible job. I am really impressed. Awesome job on that carb bud. Do you need to change the cleaning fluid in the ultrasonic machine often ?

[Canadian_Zuk]

HOD DO U DO THAT?
That sounds like the coolest parts washer ever.

Lol, they are pretty cool. It's a combination of cleaning solvent, heat and ultrasonic sound waves that do the work. I was going to type it out, but here is a copy and paste from Wiki on how they work.

In an ultrasonic cleaner, the object to be cleaned is placed in a chamber containing a suitable solution (in an aqueous or organic solvent, depending on the application). In aqueous cleaners, the chemical added is a surfactant (e.g.- laundry detergent) which breaks down the surface tension of the water base. An ultrasound generating transducer built into the chamber, or lowered into the fluid, produces ultrasonic waves in the fluid by changing size in concert with an electrical signal oscillating at ultrasonic frequency. This creates compression waves in the liquid of the tank which ‘tear’ the liquid apart, leaving behind many millions of microscopic ‘voids’ or ‘partial vacuum bubbles’ (cavitation). These bubbles collapse with enormous energy; temperatures and pressures on the order of 5,000 K and 20,000 lbs per square inch are achieved;[6][7] however, they are so small that they do no more than clean and remove surface dirt and contaminants. The higher the frequency, the smaller the nodes between the cavitation points, which allows for cleaning of more intricate detail.

Wow. That machine does an incredible job. I am really impressed. Awesome job on that carb bud. Do you need to change the cleaning fluid in the ultrasonic machine often ?

That depends on what the cleaning fluid is, what your cleaning and how dirty the stuff your cleaning is. Sediment and dirt can be filtered out with coffee filters to get more life from your cleaning solution, I do this with my carb cleaning mix. I use different solutions for different applications, sometimes is simply soap and water or laundry degergent and water. You can use comercial degreasers, simple green, amonia, paint thiner, vinigar, just about any liquid works but obviously some are better suited to certain tasks.