Description: Genuine Walbro Ethanol and UV Resistant 188-566-1 Primer Bulb
Editorial: Walbro's new Ethanol and UV resistant primer bulbs have been specifically developed
for use with higher ethanol blends and to protect against phase separation in fuel.
Made with proprietary materials designed to remediate the problems caused by direct
sunlight and aggressive fuel additives commonly found in today's fuels.
Ethanol E10, a fuel mixture of 10% ethanol and 90% petrol, is commonly found at
petrol stations. The ethanol found inside of fuel blends pose problems as the
engines are unable to compensate for the increased heat levels, decreased
lubrication, and increased corrosive effects associated with a higher alcohol
content. The undesirable result could be engine damage. Water also becomes an issue
with ethanol blends. The fuel mixtures naturally hold 0.5% water in suspension, but
any increase in this percentage causes “phase separation", whereby the
water/ethanol mix falls out of its suspension and descends to the bottom of the
fuel tank. It’s true that all gasoline is susceptible to the ill-effects of
changes in weather and moisture content, but ethanol makes the problem even worse.
Continued phase separation negatively impacts fuel systems and damages engine
parts, especially air purge bulbs. However, an ethanol-resistant air purge bulb can
mitigate the harmful effects of ethanol to drive better engine performance and
longevity. Safeguard the performance of your small engine equipment and extend its
life by switching to Walbro’s new ethanol compliant purge bulbs.
Replaces OEM: Walbro 188-566-1, 188-12, 188-12-1, 188-12-A-1, 188-14-1, 188-15-1,
Honda 16032-ZM3-004,
Homelite 01201, KK 21017 AA-013, AA-013,
Husqvarna 502 18 31-01, 503 58 37-01, 531 00 24-36, 503 59 71-01, 502183101,
503583701, 531002436, 503597101,
Kawasaki 49043-2067,
Shindaiwa 70029-81480,
STIHL 4133-121-2700, 4133-121-2700 A, 4226-121-2700, 41331212700, 41331212700 A,
42261212700,
Fits: This genuine Walbro primer bulb 188-566-1 is an Ethanol and UV resistant upgrade
replacement for Walbro primer bulbs with OEM numbers 188-12-1, 188-12-A-1, 188-14-1
and 188-15-1 commonly used on selected Walbro WT, WY, WYB, WYJ, WYK, WYL and WYP
model carburettors as fitted to selected Echo, Homelite, Honda, Kawasaki, Jonsered,
Maruyama, Mitsubishi, Robin, Ryobi, Shindaiwa, Stihl, Tanaka, Weedeater and many
more blowers, brushcutters & chainsaws.
Features: Air purge bulb assembly purges carburettor of air prior to starting engine.
Ethanol and UV resistant.
Standard Pack Quantity: 1
Brand: Genuine Walbro,
Product Line: Air Purge Bulb, Bulb - Primer, Carburettor Primer Bulb, Primer Bulb - Carburettor,
