Chrysler 4 HP Outboard Motor Service Manual OB 2278, Page 59Get this manual
SECTION XII (Con't TROUBLE
5Does not develop full power
POSSIBLE CAUSE
Fuel line kinked or pinchedFuel filter dirty or cloggedVent screw on fuel tank not fully openedAir leak in engine Air leak in fuel system Carburetor out of adjustmentIncorrect fuel-oil mixtureCarburetor passages clogged Wrong spark plugFouled spark plugBreaker points out of adjustmentBreaker points burned or pittedWeak ignition coil Water intake obstructedExhaust outlet obstructedDefecti ve condenserIncorrect tilt angleTransom too highBent propellerPropeller clogged with weedsImproper load distributionHook in bottom of boatPoor performance on boat