Even though small differences will exist between each specific engine's primer bulb design, primer bulb repairs share similar qualities. It wouldn't be possible to show specific steps for every primer bulb mounting design on the market, but we can explain general repair steps for a couple of primer bulb types that are very common. If it's been more than a season or two since your tool's engine got a new primer bulb, you'll thank yourself later for replacing it pretty much any time you have a good excuse. When performing any other work on the engine's fuel system:.Especially in the case of primer bulbs located on the carburetor, you can save yourself time on future repairs by replacing the bulb when dismantling and cleaning the carburetor anyway. Primer bulbs are often located on or near an engine's carburetor. Since a fuel line replacement requires a parts order and work in that part of the engine, it just makes sense to order a primer bulb at the same time to save money on shipping. In other words, if one wears out and cracks, you can expect the other to follow soon. Because plastic fuel lines and primer bulbs are usually the same age, they work as good barometers for each others' wear. If you're performing a fuel line repair on your tool's engine, it's most likely because the plastic fuel lines are cracked with age or wear. Reasons to Replace a Primer BulbĪ cracked, worn, or broken primer bulb is the most common reason for replacing one, but there are a number of other reasons why it might be a good idea to install a new bulb when the old one has not completely worn out yet. Steps and examples for two common types of small engine primer bulb replacements are explained and listed below. ![]() Tool owners should expect primer bulbs to eventually wear out. īecause primer bulbs are made of either plastic or rubber, replacing them is one of the most common small engine repairs. Cold starting a gas engine without a fresh squirt of fuel in the carburetor is difficult to say the least. ![]() The usefulness of primer bulbs is often under-appreciated until tool users go to start their machines and find their engine's primer bulb excessively worn, broken, or cracked. Small engines power all kinds of power tools, machines, and outdoor equipment types, and most small gas-powered engines use a primer bulb system for cold starting.
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