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11.05.2021 22:45:08
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See full version: Mercruiser alpha one outdrive oil capacity
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This is an annual or 100-hour service. It's messy and frustrating. If you use your boat enough to warrant learning to do it yourself, fine. Otherwise, spend the money to have it done by a professional. Purchase a lower unit gasket kit and a tube of M-4-C grease. The actual service on the drive shaft is simple. Slather some M-4-C grease on the drive shaft with special attention to coating the splines that slip into the engine coupler. Early model Alpha Ones have universal joints with grease zerks. A couple shots in each zerk and the maintenance is done. [links]
Once completely drained, connect the fitting on the hose pump to the lower hole, insert the pump into the bottle of lower unit oil and pump in the new oil. The capacity is about 1-1/2 quarts so you’ll be into the second quart before the oil starts to flow out the top hole, signaling that the unit is full. If a lower unit oil reservoir is mounted on the engine, use some of the remaining oil to fill it. here
Mercruiser’s Alpha One outdrives have been around for over 25 years and have a proven history of being reliable when they are well maintained. Both the Alpha One “MR” and Alpha One Generation II are easy for owners to service with a few basic mechanical tools and a little effort. General maintenance includes servicing the propeller and shaft, changing the oil inside the unit and servicing the drive shaft.
At least once each season and anytime you suspect that the propeller may have run across a fishing line, remove the propeller and inspect the shaft. Bend the tabs on the locking tab washer to allow removal of the propeller nut. Once it’s off, the propeller and other parts will slide off. Remove any fishing line on the propeller shaft, apply a coating of grease to the shaft and replace everything in order. Don’t forget to bend two or three locking tabs into the position to hold the propeller nut in place.
Purchase two quarts of lower unit oil and an oil pump that fits quart bottles. The pump will come with a hose and special fitting to attach it to the unit. Trim the unit fully down. Two flush-mounted slotted screw caps are located on the left side of the unit. Remove the one at the top, then the lower one, which will allow the oil to drain out.
It is just standard 80w90 automotive synthetic gear lube correct?
For the few extra dollars it will cost you don't cheap out. New or rebuilt drives are expensive.
Not just automotive gear oil. There is a big difference. The Marine oil will blend (turn milky and stay milky) with any water that might enter your outdrive and still offer you protection. Automotive gear oil doesn't have the additives to blend with the water and you will have a layer of oil and a layer of water sitting in your drive which
Use a curled up piece of scrap paper, bent at a 90-degree angle, to check in the same fashion. No oil on your finger, or oil that sits below the vent hole opening, means you need to add lower gear case oil. In the case of a full or low oil level, examine the oil for a tan or cream-like color and frothy appearance. Lower gear case oil that resembles the color and consistency of a milkshake indicates water contamination. Water in the oil points to a bad seal or gasket.
Place a drain pan directly under the lower unit. Locate the top vent hole oil plug on the lower unit side case. Refer to your owner's service manual for its location, if you have trouble finding it. The vent hole plug will be high up on the lower unit case and marked accordingly. The screw plug will sit countersunk and have a large slot screw head. Use a large flat screwdriver to turn the screw counterclockwise and remove the plug. [links]
Watch the vent hole after you remove the vent plug. If the oil level sits at the proper level, oil will begin to seep out of the hole and dribble down the lower unit case. This indicates a full level, so you can replace the vent plug and tighten it with a screwdriver. If you see no overflow from the vent hole, stick your pinky finger down into the hole and pull it out. [links]
Remove your boat from the water and place it on a trailer, if you have it moored or docked. Transport it to a convenient work location. Before you check the lower unit gear oil, make sure the boat trailer does not sit on an incline -- the surface must be flat and level. Adjust your motor position so that it sits straight up and down -- you cannot check the gear oil level with the engine trimmed up or down, or locked in the upright position. [links]
The lower unit gear case oil on the Mercruiser Alpha One outdrive serves a very important function. Proper oil level and quality insures that the lower end transmission gears and shafts have enough lubrication to spin freely and smoothly, with no friction. Lower unit gear case oil also provides a cooling effect so the components do not overheat. Every boat owner should check the level and the condition of his lower unit gear case oil, as often as prescribed in the manufacturer's's service manual.
Rub the oil between your fingers and feel for grit. Look at a smear of the oil in the sunlight and notice if it has any shiny metal reflections. Metal slivers in the oil indicate metal bearing shavings. Change the oil if it shows any of these symptoms. more