Getting Started and Common Tasks for Creating Posts, Dressing things up with tags and pictures, Homelite Chainsaw Posts By Saw Family & General Repair Discussions, Pistons, Cylinders, Crankshaft, Bearings, Seals, The Cutting End - Bars, Chains & Sharpening, Homelite/Fisher Pierce/Bearcat Outboard Motors. I think you have the to fuel lines backwards on the primer bulb. A cracked carburetor bulb will not be able to create a vacuum and will prevent it … 4. Craftsman Lawn tractor. it could be a slight crack or weathering in the bulb or the hose. Check that the filter's in place and in good condition. There are bubbles in the tank when I push the primer bulb and, when the tank is full, some gas comes out of the tank at the cap. Gas flows through the lines. Check valves are non-serviceable and replacement of the valve body is the only fix. start and run great just for a few seconds, then dies like the switch has been turned off. Quick fix: put some grease on the end fittings at the tank and motor. Water separators get dirty and can create a … They are similar mechanically and this information would likely apply to your unit. When I hit the primer bulb, I paid attention to the bubbles, and confirmed that the bubbles are actually going out of the return line, which I assume is correct. NO DOES NOT HAVE A PRIMER BULB.AFTER READING A FEW POSTS ON THE PROBLEM,IT SEEMS THAT THE FUEL IS GETTING HOT ENOUGH TO BOIL,MAIN REASON BEING, NEEDS CLEANING BETWEEN ENGINE AND GAS TANK,AND A FEW OTHER THINGS CAN CAUSE THIS TO OCCUR AS WELL.LET YA KNOW HOW IT GOES. If … Hi Guys, I picked up a new hood for my brother's JEEP. Thank you for the question on bubbles in the primer bulb. The air has to be being drawn into the line if you're seeing it, presumably from the top unless things are completely clogged there and it's drawing backward... Clogged carb would mean you weren't drawing gas, not that you'd be drawing air into that line... Do the bubbles move in the gas line at all? The primer bulb can’t suck it up without removing it. All my engines have used an arched fuel line approach to the carb without problem. Holes or splits can eventually form in the primer bulb. When the outboard is running normally, the engine’s fuel pumps create a slight vacuum in the fuel hose. If not try it that way. Tiny bubbles that are uniform across the panel: these types of bubbles most likely are caused by moisture in the paint process. We are more concerned of a car paint bubble as it pertains to a refinish process. Painting a vehicle with too much moisture in the air lines will create a problem. the primer bulb was staying half full of air so i thought the primer was bad. Curious question, Does the chainsaw have a primer bulb? As the moisture gets trapped under drying paint it will come to the surface within a short period of time, a few weeks or longer. Re: Primer ball won't get hard. If you do not, the check valve in the primer is bad. Review these links while waiting for an expert response. Going backwards like that would require source of gas to be from "vent" line in tank which isn't low enough into tank and would not be filtered. Why? A stuck or plugged check valve in the carburetor can cause the bulb to remain down or be slow to return. Check the Primer Bulb for Holes. On any line older than 5 years, the sun causes the bulb, rubber end connector inserts, and fuel line to age, shrink, harden and crack, leading to tiny air leaks that prevent the fuel pump from pulling gas into the motor, especially at idle. I DRAINED THE FUEL TANK AND PULLED THE PICKUP OUT.LITTLE DID I KNOW THE OLD ORIGINAL CLUNKER HAD BROKEN FREE FROM THE BOTTOM AND COVERED WITH STICKY VARNISHED FUEL.NOTICING THE CURRENT PICKUP WAS SMALLER I THOUGHT I'LL PUT THE CORRECT PICKUP IN AND PROBLEM FIXED(AIR BUBBLES IN FUEL TANK) I CUT SOME WOOD,SAW STOPPED,TOOK OFF THE CAP, FUEL WAS BUBBLING,PULLED THE PICKUP OUT,FUEL STILL BUBBLING,FUEL WARM BUT NOT HOT.DO THE SXL 925'S HAVE FUEL RETURN LINES, CRANKCASE CHECK VALVES? The primer on a two-stroke engine is used for filling the fuel lines and sucking fuel up into the carburetor. Both the manual choke system and the manual primer system engines may experience this similar symptom of running only when the fuel mixture is enriched. POSSIBLE CAUSE. Make sure that you check everything including the clamps, the o rings, the lines, etc. However if the arch is too large a vapour lock can occur. Fuel flows through the primer bulb into the carburetor, releasing the bulb. I did some research in regards to high RPM on a weed whacker and could only find like situations with lawn mowers. Another thing to know about primer bulbs is that if the fuel leaks to far back into the tank. It has a new fuel lines from the tank to carb and inside the tank. Definitely pulls from carb side and pushes into tank side which makes no sense to me at all. Otherwise, there's no way but a failed line for air to get in. At full throttle everything was fine but as soon as you let off it would often stop dead. Some of the new trimmers have colored limiter caps on the low and high speed jets. Then there is the other style that is a little more complex but works on the same principle as the Purge Primer. Then there is the other style that is a little more complex but works on the same principle as the Purge Primer. This time I ended up with tiny air bubbles all in the paint. Have taken it apart. Then the finish was JAU Acrylic Urethane. Install the new primer bulb. 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