![]() ![]() Tools: To replace flax packing, you need two wrenches: one to release the lock nut that holds the packing adjustment nut in place and one to unscrew the packing nut itself. Although referred to as "dripless", some installations may require that a very small amount of water be allowed to drip into the boat to act as lubrication and reduce heat buildup.įlax packing comes in many different cross sections, depending on the distance between the shaft and the inside of the packing nut. Installation requires that the moldable packing material be sandwiched between two rings of conventional or impregnated flax. This is a clay-like substance designed to mold to the inside of the stuffing box to seal without water lubrication. ![]() Synthetic packing: An alternative to traditional rope-like flax packing can be found in the Drip-Less Moldable Packing Kit offered by West Marine. Tallow, Paraffin or Teflon-impregnated flax: Impregnated flax packing is stronger and with Teflon added, creates even less friction against the turning shaft than standard wax impregnated flax. Sealing the shaft completely will cause a buildup of heat and eventually damage the shaft. This small amount of water serves to lubricate the shaft. Note: A properly adjust stuffing box will allow two or three drops of water per minute to enter the boat when the engine is running and the shaft is turning. Properly packed flax is compressed and watertight, but decomposes into blackened fluff over time. ![]() Regular flax: Properly installed flax consists of cut lengths of flax, bent into rings, which have their splits staggered around the shaft to minimize leakage. ![]()
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