1983 Yamaha 30EN Outboards Service Manual, Page 169Get this manual

1983 Yamaha 30EN Outboards Service Manual, Page 169

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POWER LOSS
Fuel tank Fuel is deteriorated or dirty Fuel hoses Leakage, Bent, KinkedFlattenedBroken Fuel filter Clogged Fuel pump Worn or broken, Gasket is cracked and leaky Carburetor Needle val