How often should shaft seals be replaced?
No replacement intervals are specified, but every 10 years would be a good rule of thumb. These lip seals are meant to be drip-free and if a drip develops then the seal will have to be replaced in the near future.
How are boat propeller shafts sealed?
Seals fall into two main categories – face seals and lip seals. Both types use an articulated rubber sleeve to keep the water out, but face seals use a collar, clamped to the shaft, that bears upon a surface on the end of the articulated hose. Face seals compress a fixed bearing against a collar attached to the shaft.
What is this oily sludge beneath my prop?
The oil that this boater was seeing is probably partially burned 50:1 oil from the engine powerhead. This mixture of oil and carbon builds up in the exhaust chamber of the engine, and eventually will wash off and drain out. The result is a very black oily sludge coming from the propeller.
How do you change the prop shaft seals on a Johnson?
They are a great gear case and the prop shaft seals can be changed by either pulling the bearing carrier. Or by utilizing the quick way as we have described earlier. Most Johnson Evinrude lower unit prop shaft seals are pulled out from the outside.
Are Johnson Evinrude lower unit prop shaft seals pullable?
Most Johnson Evinrude lower unit prop shaft seals are pulled out from the outside. This means that they will be easily pulled out by utilizing one of the two methods. The thing about these seals though. Is that they have a thicker metal frame to them. So they are harder to bend with the screwdriver.
Will fishing line damage a Johnson outboard propeller?
Every time you go boating where people fish, you’re taking a chance on running over a piece of fishing line that someone threw over the side of a boat or from shore. Fishing line that casually wraps itself your Johnson outboard’s propeller shaft behind the propeller destroys the prop seal.
How do you lubricate a new propeller shaft?
Coat the outer surface of the new propeller shaft seal with a light dusting of spray penetrating lubricant.