Chrysler 20 and 30 HP Outboard Motors Service Manual OB 3435, Page 31Get this manual
Checking Fuel FlowFirst make sure that there is fresh supply of properly mixed fuel in the tank Open the vent of the fuel tank cap and prime the motor by squeezing the prime bulb When the carburetor bowl is full of fuel, pressure will be felt on the priming bulb No Fuel to Combustion ChamberRemove spark plug and check its condition dry plug means that no fuel is reaching the combustion chamberIf the carburetor fuel bowl is known to be full, but the spark plug is drythen the carburetor jets may be plugged FloodingA wet spark plug means that the motor has been over-choked Go through the procedure for starting flooded motorDisconnect the fuel supply line from the motor, remove all spark plugs and spin the flywheel several times to remove the excess fuel from the combustion chambers Reconnect the fuel linereplace and dry the spark plugs Start the motor in the normal manner
No Fuel to Carburetor BowlIf the carburetor bowl is dry, check the line for obstructionDisconnect the fuel line from the fuel pump Direct the fuel line into suitable container and squeeze the bUlbFuel should come out if the line is not obstructed Disconnect the fuel pump to bottom carburetor line from the bottom carburetor and direct line into suitable containerSqueeze th bulb No fuel indicates an obstruction at the fuel pumpusually the fuel pump filter If squeezing the priming bulb produces fuel flowthen the trouble is in the carburetorprobably stuck float valve or binding float