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With our SecureStep system
USA lakes and rivers of the west US region
TIMEZERO Navigator v3 can provide up to 16 days of weather forecasts
40% better protection against water ingress and electrolysis - vs
Johnson Pump 09-810B-1 F4 Impeller (MC97) Boat Optimist With our SecureStep systemTake good care of the cooling system change to a new impeller every year! The impeller is a very important security device. Its task is to pump the water through the cooling system of the engine. But remember that the impeller should be replaced every year. And always make sure you get a Johnson Pump Brand original impeller. Then you'll know it matches your pump exactly. 50,8 mm Width 22mm Impeller article number 09 810B 9 Nitrile (oil resistant)