Antique Johnson Outboard Motor parts
I adore the smell of two-stroke exhaust each morning. Assuming your outboard ended up being brand-new during Reagan administration, you know what i am talking about. Those old outboards were built difficult, and plenty of all of them remain running powerful today.
Like anything technical, however, an old outboard requires some love. Rubber many years, parts put on, and corrosion operates its training course. Pretty soon that devoted old Johnson is letting you down. Continue reading for some suggestions to help your old outboard prevent or overcome the ravages of the time.
Choose the BookA service manual will give you important guidance. Typically available from authorized marine dealers but also from on-line solution literature dealers, and on occasion even on e-bay, the solution manual will show you how exactly to simply take things apart and place them back collectively, record crucial specs and maintenance information, you need to include details like the place of most lubrication things.
Gasoline SystemAge, heat, and ethanol can decline plastic and synthetic components inside gasoline system. This will cause dangerous gas leakages or allow environment is attracted into the system and work out the engine difficult to begin or keep operating. Fuel outlines becomes difficult and brittle, and also deteriorate through the inside-out.
Aged gasoline pump diaphragms and look valves can also make an outboard difficult to start. It’s perhaps not too big a job to simply change every one of the gas outlines on an outboard with hose pipe made from modern-day materials designed to endure ethanol. Get marine-specific, ethanol-rated gas line from your own dealer. Additionally kits available to reconstruct pulse-type gas pumps offering brand-new, ethanol-tolerant diaphragms and check valves. Same applies to a kit to reconstruct the carburetors. If the carbohydrate system does not consist of a float, be sure to in addition change that component. A rehabilitated fuel system are safe and purpose at maximum performance.
Water PumpIt does not touch gas, however the rubberized impeller regarding the liquid pump will get dried out and rigid as we grow older, particularly if the motor is not made use of frequently. If engine features seen most hours, the impeller vanes could be used or scored. Even if you see liquid online streaming through the tell-tale quietly of engine, the water pump might not be delivering full stress to the coolant system, as soon as the pump finally fails may very well not observe until the engine overheats. Changing the impeller is truly low priced insurance coverage. In addition inspect the pump housing, which on numerous motors can be changed if it is been scored by abrasive sand. Finally, inspect the water intake port(s) from the reduced device to make sure they are not blocked with debris–a stiff line may be used to poke all of them obvious.
PropellerObviously in the event that propeller is within rough-shape, an upgraded or a fix is going to enhance overall performance. Even in the event the prop looks okay, its blades might somewhat bent from affecting a soft base and/or blade cupping might used; it's hence no more in balance or properly pitched. A prop shop can position the propeller on a jig to test and tune up blade alignment. Needless to say, propeller design has come a long way in the past 30 years. If you’re however working a prop created prior to the introduction of computer-aided design, one step around a newer design could make an impact in overall performance and economy.
As you’ve got the prop from the engine, check for fishing line covered round the shaft near the propshaft seal; it could destroy that seal and allow liquid enter the gearcase.
The truly poor website link on an old prop is the plastic hub pillow. Such as the fuel system therefore the liquid pump impeller, the rubber hub material gets dry and dense since it ages and it is constantly exposed to hot and acid fatigue. The relationship between hub splines additionally the barrel of the prop can fail once the hub product dries out, making the propshaft disconnected from prop. Beware a classic prop from dealer stock—a marine technology I know thought he’d struck pay soil when he discovered a 30-year-old NOS stainless-steel Mariner prop for their 25 HP motor, gathering dust in a dealer stockroom. Although it was “NOS” (brand new concerning rack) the hub ended up being dry and spun out the next time he utilized the prop.