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 Book

A 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 System

Age, 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 Pump

It 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.

Propeller

Obviously 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.

Spark Plugs and Wires

Most outboard owners know to toss an innovative new set of plugs in a two-stroke outboard every period. But like anything else rubbery on an outboard, temperature and ozone will cause the spark-plug cables or cables to age with time plus they must also be changed. Old cables will feel stiff or brittle, and can develop little splits in insulation that will allow present to arc out from the cables. One method to look for arcing is to start the motor at nighttime utilizing the cowl off, to check out white or brilliant blue flashing in which the current is escaping the cables and grounding somewhere from the motor. New plug cables will guarantee all of that present hits the plugs.

Rebuild the Recoil

If your engine features a manual rope-start (the so-called Armstrong program), it will likely take advantage of a rebuild. Mounted on the top of powerhead, the recoil is exposed to some engine temperature, and gets baked when you look at the hot sunlight, especially under a black cowl. The lubricating grease gets old and waxy, and the entire apparatus can be polluted with dirt and minerals through the water. The line it self will age and get rigid and turn susceptible to breaking, often at its end where it’s crimped across the spool or pulley.