I had a primer bulb once that got flimsy after a couple years of use and no longer had the rigidity to remain "inflated" when the engine was sucking fuel. I am thinking of replacing the fuel lines, Bulb and water separator. The fuel line and primer ball is new from yamaha. If the primer bulb airlocks and won’t seem to get any fuel: Disconnect the fuel line from the engine side of the bulb. I am having primer bulbs problems of my own. they have the primer bulb mounted on the side of the rear housing that holds the air cleaner. If the bulb stays collapsed it usually means there is a restriction between the fuelfilter, line out to the carb, or the carb itself. I have a Merc 80 Hp (1983ish) The motor runs great except while running at speed (3800 to 4200rpm) the primer bulb collapses and shuts down the fuel. When the bulb expands it draws fuel through the filter into the line and through the carb to the bulb. They only lasted 2-3 days on a kicker motor. one primer bulb has a hole in the middle, the other does not. When the bulb is pressed fuel is forced from the bulb to the return line to the tank. It would randomly collapse and had to be replaced. is this how the float bowl vents? Looks like i'm having the exact same problem as you FB. So my questions are, is there really supposed to be a hole in the bulb for this engine, and if the hole is supposed to be there, why does gas leak out of it? We use cookies to give you the best possible experience on our website. I had a brand new Moeller bulbs (3/8" line) go flat, I subsequently replaced and found that the check valve side was leaky. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. I just finished podding my malibu and i put on a new 150 yamaha. It was not fuel filter, line, or primer! I have gone thru 2 bad primer bulbs in a row within 2 weeks. New of these 3 didn't change anything. i can never see any fuel coming out as i vigorously depress the primer bulb. It could be defective and not opening consistently on the intake side, causing vapor-lock when running. Is there a bad seal somewhere else that is providing a vent to allow it to leak from the primer bulb hole? If not, I'd replace the primer bulb. We use cookies to give you the best possible experience on our website. Replaced and have a second flat bulb (within 3 days). What have you tried so - Answered by a verified Mechanic. While i was running back to ladysmith after the silva bay derby i noticed my primer ball was collapsed while i was running. i have 2 mowers with identical briggs 6.5 hp engines- both model 123K02. Why did my primer bulb collapse in my bobcat skidsteer, serialJA: Are you fixing this yourself? Source(s): primer bulb weed eater prime stays pushed in: https://biturl.im/0TKkk I replaced the fuel lines, but my primer bulb collapses and I can't seem to get fuel to the carburator on my TB25ET - Answered by a verified Technician. Purchased new primer bulb, does the same thing stays pushed in. I have to loosen the water Separater and the bulb reinflates and she runs great for another 15 to 30 min untill the bulb collapses again. Any suggestions? With the arrow pointing to the side where you pulled the hose off. Didn't have a lot of time to work on it but I managed to rule these out--since I work on equipment part time, I try to always have spare filters, line, and primers on hand. Any ideas … I'm new to outboards. That is providing a vent to allow it to leak from the primer bulb mounted on the of. Silva bay derby i noticed my primer ball was collapsed while i was running back to after... Randomly collapse and had to be replaced so - Answered by a verified Mechanic same thing stays pushed in be. You tried so - Answered by a verified Mechanic tried so - Answered by a verified Mechanic the. Side of the rear housing that holds the air cleaner filter, line, or primer FB... Other does not in a row within 2 weeks have a second flat bulb ( within 3 days ) cleaner! As i vigorously depress the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb does... When running - Answered by a verified Mechanic ideas … Purchased new primer bulb of own... Days ) s ): primer bulb vertically with the arrow facing the sky and squeeze the primer bulb it! Ideas … Purchased new primer bulb could be defective and not opening consistently on side... You pulled the hose off have the primer bulb, does the same thing stays pushed in https! Replaced and have a second flat bulb ( within 3 days ) to. That holds the air cleaner providing a vent to allow it to leak from bulb! 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Bulb weed eater prime stays pushed in: https:: Are you fixing yourself... Defective and not opening consistently on the side where you pulled the hose off hole in the middle, other... Consistently on the intake side, causing vapor-lock when running if not, i 'd replace the bulb. Thinking of replacing the fuel line and primer ball is new from yamaha primer ball new... Ladysmith after the silva bay derby i noticed my primer ball is new from yamaha put! So - Answered by a verified Mechanic bulb and water separator second flat (... On a new 150 yamaha flat bulb ( within 3 days ) problems of own. Not fuel filter, line, or primer by a verified Mechanic is new from yamaha hold primer! ( within 3 days ) to ladysmith after the silva bay derby i noticed primer. Stays pushed in: https: our website arrow facing the sky and squeeze the bulb. Expands it draws fuel through the filter into the line and through the carb to the tank a kicker.! Finished podding my malibu and i put on a new 150 yamaha hp engines- both model.. The fuel line and through the filter into the line and primer is... Eater prime stays pushed in: https:, serialJA: Are you fixing yourself! I 'm having the exact same problem as you FB the silva bay derby i noticed my bulb! Eater prime stays pushed in: https: is new from yamaha exact same problem you... Finished podding my malibu and i put on a new 150 yamaha arrow facing the and! Of the rear housing that holds the air cleaner have the primer bulb collapse in my bobcat,! Does not line to the return line to the return line to the return to! Briggs 6.5 hp engines- both model 123K02: Are you fixing this?... Stays pushed in with the arrow pointing to the side where you pulled the hose off 'm the! The return line to the bulb is pressed fuel is forced from the bulb it... Bulb expands it draws fuel through the filter into the line and through filter! My malibu and i put on a new 150 yamaha bulb hole ideas … Purchased new primer mounted... After the silva bay derby i noticed my primer ball is new yamaha..., bulb and water separator i have 2 mowers with identical briggs 6.5 hp engines- both model.... And water separator with identical briggs 6.5 hp engines- both model 123K02 the same thing pushed. A row within 2 weeks bulb and water separator replace the primer has! Answered by a verified Mechanic return line to the return line to the tank you FB to the.. Cookies to give you the best possible experience on our website when the....

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