How to remove lower unit on mercury outboard

Sometimes boat issues seem like theyll be really complicated but end up. Whenever you need to service your outboards water pump or replace the inputoutput shaft seals youll have to remove the lower unit first.

Whenever you need to service your outboards water pump or replace the inputoutput shaft seals youll have to remove the lower unit first.

How to remove lower unit on mercury outboard. Use the socket wrench extender and 916-inch socket to remove the hidden bolt holding the lower unit in place. Pull the lower unit away from the rest of the motor twisting the lower unit if necessary to free the drive shaft and shifter. Use appropriate caution when removing the unit and wear safety shoes.

Mercury 40HP Outboard Lower Unit Removal. Whenever you need to service your outboards water pump or replace the inputoutput shaft seals youll have to remove the lower unit first. Follow the steps below and watch the video above to remove the lower unit from a Mercury 40HP four-stroke outboard engine.

Remove three of the 19mm nuts and washers. Support the lower unit as you remove the fourth 19mm nut and washer so the lower unit can only drop a few inches. Reach into the lower unit and release the speedometer tube at the front.

15 hp 1998 mercury outboard manual shows a coupler wjam nut to disconnect the upper and lower shift shaft for removal of the lower unit my engine has a one piece shaft how do I separate the lower. How do you align upper shift lever and lower unit No the LU should shift into each gear as you turn the shift shaft. If you are in fwd turn the shift shaft counter clockwise should feel some pressure then the pressure will let up this should be nuetral then one more turn CC to reverse.

You may want to try some WD 40 spray on the shift shaft. LOWER UNIT REMOVAL DISASSEMBLY. Always disconnect the battery cable before removing lower unit.

Shift to NEUTRAL position. Remove bolt and trim tab 1. Remove seven 7 bolts 2 and separate gearcase 3 from driveshaft housing.

Remove clutch rod from clutch shaft if necessary. Place a drain pan under oil drain plug. First thing check the lower unit oil.

If there is water in it the bent shaft is a mute point. Second the easiest way is pull the prop off and run the engine in gear while on flushing muffs. Look at the center mark of the shaft and see if it wobbles even a little.

How do you remove a boat prop shaft. How To Remove an Inboard Boat Propeller. Leave the Nut On.

Thank you allI cant figure out how to drop the lower unit on a 1972 Mercury 1500150HP outboard. PLEASE PLEASE helpAbove post describes how to remove. When replacing the lower the shift shaft Splined shaft in front of main shaft must be put back the way it came off otherwise you can have a shift problem.

Slide the lower unit straight down and off the outboard. Set the lower unit upright in a bench vise. Remove the four bolts holding the water pump together from the water pump housing with a socket wrench.

Slide the impeller from the lower unit and slide them up and off the driveshaft. Mercury Outboard Lower Unit DiagramMercury Product Protection is a factory-backed extended coverage plan completely administered and backed by Mercury that can give you up to eight years of worry-free boating with your Mercury outboard or Mercury MerCruiser sterndrive. This is for 1980-2005 Johnson Evinrude EnginesWater Pump Kit Reference Chart.

Support the lower unit to prevent it from suddenly dropping then remove the four 16mm lower unit mounting bolts. Carefully slide the lower unit away from the outboard being careful not to damage the drive shaft or the shift shaft and youre done. Trying to align lower unit drive shaft on mercury outboard 150 after replacing impeller.

There appears to be something blocking the entrance to the upper gear and preventing alignment Mechanics Assistant. Sometimes boat issues seem like theyll be really complicated but end up. Although being labeled the father of Mercury Outboards its interesting that Kiekhaefer actually worked as a draftsman for Evinrude outboard motors in 1927 however was fired after just 3 months employment with Evinrude.

Kiekhaefer had 3 unique qualities that made him less than the ideal employee 1 He had a keen eye to see inherent flaws in mechanical designs 2 He often fixated and worked tirelessly trying. My original question wasI replaced my water pump on my Mercury 90 hp 4stroke outboardAfter i installed the lower unit I found the engine in gear when I started the engineYou suggested I lower the. Pull down on the lower unit gear housing and separate the lower unit guiding it straight out of the exhaust housing.

Remove the last two lock nuts as this occurs. Ease the shift shaft and driveshaft out of the exhaust housing as the lower unit is removed. Place the lower unit in.

The proper way to remove the lower unit on a MerCruiser stern drive is completed in two steps. First you remove the sterndrive and then you separate the lower unit from the upper gear box. It is possible to drop the lower unit while the stern drive is still attached to the boat but replacing it is very difficult.

1976 Mercury 75 longshaft motor. I cant remove the lower unit to rebuild the water pump. I got the 2 nuts removed but the lower unit wont slide of.

The housing is loose but it feels like something is still holding it in. The Merc dealer seems to think the drive shaft is rusted to the power head and suggested I pry it off.