Snapper SS312 weed eater. Cranks when primed but won't run
Compression tested @ 90 psi. Ultrasonic cleaned carb. with cleaner.
Installed carb kit. Replaced carb to intake gasket. Checked reed valve.
Adjusted metering tab to Walbro specs. Carb type is Walbro WT.
Removed adjusting screws before cleaning carb. Replaced screen in carb. Noticed that primer bulb pumps up hard. All other similar carbs I have worked on, the primer bulb could be continously pumped without any hard resistance. Have tried adjusting screws in all imaginable position. Good spark. With adjusting screws closed almost completely off, motor will crank and run until prime fuel is consumed. The farther I open adjusting screws, the harder it is to crank. If I open them to 1 turn each, motor will not crank.
Any Suggestions besides buying another carb or weed eater?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
First diagnose whether its a fuel, ignition, or compression problem. Remove the air filter cover and air filter. Spray a shot of carb cleaner into the carb and attempt to start ( choke should be open, throttle closed). If the unit starts on the prime then you have a fuel problem. Proceed by rebuilding the carb and if the fuel lines or primer bulb are brittle or discolored then replace them as well. Be sure that you use fresh fuel ( less than 2 weeks old) and if ethanol is in your fuel be sure there is no water in your fuel. If the unit doesn't start on the prime then check spark and compression. Compression should be between 120 and 140. If less than 90 the unit should be replaced.
I would recon that the the little fuel filter in the fuel reservoir tank is congested, or that the hoses feeding the fuel has deteriorated, have had a number of them display these issues, also check the the primer dome, if that leaks or has deteriorated it will also present problems, finally just double check your fuel mixture, good luck, these things can challenge your resolve
remove the sediment bowl on the bottom of the carb,but dont lose the gasket and watch out when the float drops so the needle and spring in the bore dont fall and you lose them,then clean out any dirt in the bowl and in the needle seat andget some carb cleaner and throughly clean out all openings in the carb,its a california carb thats why there are no adjustments
double check your carb as it should have a screw for the fuel mixture. some carbs have a plastic piece over them that only lets you move the screws so far if you need more extreme adjustment they pull out about a 1/8th of a inch then you can turn in then push it back in, same principals as making a flame on a bic lighter bigger, if you cant find it take some pics of your carb and email them to me @ [email protected] and i will point them out
It sounds like the carburetor needs cleaned. Take the carb. apart and clean it with carb. cleaner. Use a Den Tech Brush, (used for cleaning teeth), they are perfect for cleaning the small ports in carb. If that still doesn't work, you may need to buy a carb. kit for your weed eater. If so, replace the gaskets and valve needle, and also make sure to replace the small screen. this should all come in the new carb. kit.