Notes

Yamaha Lower System-- 100-Hour Service
Yamaha reduced system gear lube is drained pipes by removing the lower drainpipe screw initially and then the upper plug air vent to permit air in. On most versions, both plugs are clearly visible on the lower device, yet on designs with low tide pick-ups, the forward pick-up will certainly require to be eliminated to access the drain plug. Use a correctly sized screwdriver aided by a wrench if required to loosen these screws which need to be quite tight. An impact chauffeur and hammer may be required depending upon who serviced your engine last. The drainpipe screw has a magnetic idea, so inspect the plug after removal to see if hefty down payments exist. Some fine shavings are typical, however portions or a big quantity of metal is cause for further evaluation. Have a drainpipe frying pan as well as added dustcloths helpful as gear lube will certainly start running down the skeg as quickly as you get rid of the top vent plug. Make sure to accumulate the fiber gaskets from both plugs after removal, as these are not multiple-use and also ought to be disposed of.

Enable a number of mins with the engine tilted completely down to totally drain pipes the old equipment oil. Like your engine oil, evaluate the invested oil for proof of water invasion or other contamination or metal. If you have purchased among PartsVu's useful lower unit oil adjustment packages you will certainly already have brand-new gaskets, oil, and also a pump. Screw the pump into the reduced drainpipe hole and then connect it to the quart of Yamalube gear oil or HD gear oil depending on your version. Start pumping oil into the lower device till oil starts to flow from the air vent plug at the top. Stop pumping and wait a few mins for all the air bubbles to work themselves out of the gearcase. After this short pause, pump a few even more pumps till clean gear oil without bubbles is moving from the vent plug. With mercury outboard propellers in position, install and torque the leading air vent plug. Unscrew your fill tube from the reduced drainpipe plug and promptly swap in the reduced drain plug with a brand-new gasket. Torque to spec and re-install the reduced water pickup screen if suitable.
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