While you are pulling the shaft, send out your props to be checked for accuracy and balance. Start the driveline checking process with the shaft because even a minor issue with the shaft can cause noise and vibration problems and if you try to fix those by adjusting engine mounts, you will spend a fair bit of money without fixing your vibration problem. An amateur with a pry bar can do real damage. This is not a simple DYI project because separating the coupler and sliding it out often requires special tools. It slides out of the stuffing box and through the cutlass bearing in the strut before it’s free. Dropping the shaft requires the coupler between the transmission and the stuffing box to be undone and often the rudder and stock have to be removed to slide the shaft out. Also, the shaft itself is a large and heavy piece that has to be checked when it is outside the boat. A good shaft can be trued up, but one that has been run bent or out of alignment for several seasons, can be ready to snap from fatigue.Įven a very small amount of damage can start a chain reaction of problems. Start the process by having your mechanic send it out and verify that the shaft is straight and has no visible wear spots. You really don’t want to suffer that broken shaft. Plus, it will be a touch more economical and a lot longer lived. When things are all on spec, the boat will be at its smoothest and quietest. It comes down to accurate alignment in the drive train. Constant vibration, heat and noise may be dampening your fun every time the boat is run. You don’t need a broken drive shaft to spoil your day. On recreational boats that get only weekend and occasional vacation trip use, total hours of operation are often low and inboard driveline elements are sufficiently simple and robust that they can last for years without failure…but there is always wear. Of course, there is always a shaft to which the propeller is attached.
Inboard boat propeller shafts install#
Install cotter pin at end of the shaft.When was the last time you sent your propeller shaft to the machine shop to be checked? How old are your engine mounts? Have you replaced your cutlass bearing recently? Do I sound like your mother? Well, if she were here, she’d be giving you some important advice! Powerboats and sailboats with inboard engines generally have rubber in the engine mounts, packing material in the stuffing box and a cutlass bearing in the propeller strut.Install the torque jam nut also, if your shaft is so equipped. When propeller hub moves to correct position, install propeller nut on shaft and torque to seat the propeller.NOTE: A vise can be used to hold key while it is being filed, but care must be taken not to overly tighten the vise which can cause burrs and irregularities on the key. If it does not line up then repeat Steps "a" through "e". Check to see if it reaches the line made as in Step 7. Replace the propeller on the shaft and fit snugly on taper.Install cleaned key in shaft keyway with chamfered corner side down in shaft (the cleaned, filed side up in keyway).Run opposite end of chamfered key back and forth over file (to remove any burrs) with a downward pressure on key until side being filed is clean.Place a file on a flat surface area or work bench.Check to see that the propeller moves back to the forward line made in Step 3.
Put key into keyway on shaft taper with radiused or chamfered corners down in shaft keyway (if propeller shaft keyway has radiused corners).Make a line on the shaft with a non-graphite marker at the forward end of the propeller where it stops up against the shaft taper.Make sure the propeller is snug and there is no side to side movement by gently moving propeller back and forth.Push propeller snugly onto shaft taper WITHOUT key in either keyway (propeller or shaft).
Inboard boat propeller shafts full#
Johnson has been making props since 1936, so they know what they're doing! See our full line of props on our site.įollowing are instructions courtesy of Michigan Wheel, for installing a propeller: Glen-L carries a selection of Johnson OJ Propellers from their "Legend" line.
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