Greetings:
I have a Troy Bilt pressure washer that has a B&S 4.5 HP vertical shaft engine (appears to be 10J902 or close to it). Recently, the engine developed the following problem: it’ll start and run a few seconds on the gas from priming it with the bulb, but won’t run at all thereafter. (Same thing with starter fluid.)
Tried cleaning the carb; no luck.
Completely replaced the carb and cleaned out the gas tank (the carb bowl is molded to the top of the gas tank). After I did that, it fired up and I figured, “problem solved.” Next day, I gassed it up to begin a spring cleaning — same old story. Removed the carb and checked/re-cleaned the screens, bowl, etc. Based on an online tip, I scored the mating plate at a place where there’s too long a distance between the bolts to create a reliable seal on the diaphragm (apparently this is a design flaw for this type of engine, and scoring the plate at that location is the official B&S fix for it).
Put it back together, and after a few tries managed to get it running (enough to run through an entire tank of gas).
This morning, gassed it up to finish the project: back to square 1; same old story. It’ll start and run until the gas from the prime is exhausted, then it dies. If I push the priming bulb when it starts to die, it’ll run for another second.
Ergo, for some reason it’s not sucking gas from the tank. Another data point: the priming bulb takes a few seconds to return to shape after depressing it (In the past, it would spring back almost instantly). I’ve blasted out everything in the carb repeatedly, so it doesn’t appear that a jet is clogged (but with these molded plastic carb bodies it’s admittedly hard to tell).
Ideas on how to fix?
I have a Troy Bilt pressure washer that has a B&S 4.5 HP vertical shaft engine (appears to be 10J902 or close to it). Recently, the engine developed the following problem: it’ll start and run a few seconds on the gas from priming it with the bulb, but won’t run at all thereafter. (Same thing with starter fluid.)
Tried cleaning the carb; no luck.
Completely replaced the carb and cleaned out the gas tank (the carb bowl is molded to the top of the gas tank). After I did that, it fired up and I figured, “problem solved.” Next day, I gassed it up to begin a spring cleaning — same old story. Removed the carb and checked/re-cleaned the screens, bowl, etc. Based on an online tip, I scored the mating plate at a place where there’s too long a distance between the bolts to create a reliable seal on the diaphragm (apparently this is a design flaw for this type of engine, and scoring the plate at that location is the official B&S fix for it).
Put it back together, and after a few tries managed to get it running (enough to run through an entire tank of gas).
This morning, gassed it up to finish the project: back to square 1; same old story. It’ll start and run until the gas from the prime is exhausted, then it dies. If I push the priming bulb when it starts to die, it’ll run for another second.
Ergo, for some reason it’s not sucking gas from the tank. Another data point: the priming bulb takes a few seconds to return to shape after depressing it (In the past, it would spring back almost instantly). I’ve blasted out everything in the carb repeatedly, so it doesn’t appear that a jet is clogged (but with these molded plastic carb bodies it’s admittedly hard to tell).
Ideas on how to fix?