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Re: 2001 mercury 25 hp will not go in reverse
Disconnect your shift and throttle cables, they may be reversed. See if the engine will shift now by hand. If it does not, then the problem was created when the shop benched the gear box and reinstalled it. Take it back even if it was last season. This kind of problem usually does not happen by itself.
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Keep the gas in your outboard new/clean with new oil every 6 months..Keep your motor covered when not in use, Dirt dabbers (dobbers) will build nest under the hood and break loose and ruin your motor, ,,Change your water pump and thermostate every year when motor is used a lot.....Dont run stainless steel props on small hp motors ,when you hit a log it will bend your prop shaft costing big $$$ to replace..Ck your lower gear oil if water is noted ,replace lower seals...Dont buy used motors unless you run a compression ck....ck for water in gear case , Dont buy 4 strokes to heavy to slow to many parts AND are being replaced by fuel injection 2 strokes .... Dont buy FORCE motors not made by mercury no parts being made and or extink and pure junk . Etex best motors , .
the gear shift shaft/rod pushes down on a metal wedge inside the gear box this forces a dog clutch to engage a gear and transfer the engine drive to the prop shaft along the prop. A return spring keeps the dog clutch against the wedge so that when the shift shaft/rod is lifted the dog clutch disengages (neutral) if you keep lifting another gear is engaged, astern. Missing one of the gears, adjustment. No gears, shaft/rod alignment. Is yours direct mechanically hard linked or does a cable transfer the movement to the shaft? Check the top shift connections first, before taking the leg apart again.
Hope the above, windy reply is useful.
Take The Propeller Off, Use The Rear Thrust Washer As a Tool Turn It Upside Down And Put It Back On The Prop Shaft The Three Slots Should Match With Bearing Carrier.,Undo Three Bolts On The Carrier In The Back Of Gear Box, Turn Carrier Counter Clock Wise Until It Is Loose Remove Prop Shaft Complete With Carrier and Reverse Gear
mercury and others have a "sawtooth" cut for forward gear so the prop will rachet spin backward when dry tested, and a square clutch dog for reverse, which when it finally engages locks the prop in reverse. and will not spin in either direction.
So when you shift--- snap in in gear-- do not ease it in gear, as it will wear the dog out faster.
See if you can turn down the base idle some. Then check your gear lube, sometimes you can get an airpocket and the top end is dry. Last, if still not fixed, see if you can adjust the cables so that the throttle RPM changes after the gears do.
You want a little lag in the throttle so you don't take out a dock when coming onshore.
we had replaced the engine in our 87 4.3 star craft and when we put the omc cobra stern drive back in we now dont have foward gear, we have nuetral and reverse. could it be the linkage or could it be the shifter cable or any other idea's that could be the problem.
Keep an eye on it and put a bucket with paper inside under the motor. You want to know whether the oil is burnt oil from the exhaust or gear lube. You should be able to tell from the color of the oil. Its kind of like soot in a chimney, the exhaust goes through the prop with the oil you added to the gas.