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Mercury 9.9 2 stroke motor goes but propeller not moving

Posted by Te Rangihopuata... on

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Fabrice Wolters

  • 331 Answers

SOURCE: 75 2 stroke mercury optimax motor problems

4 beeps every 2 minutes has 2 causes:
1) LOW oil level in the engine mounted reserve tank ( fill it up manually )
2) Water in the engine mounted water separator/fuel filter ( clean out )

Posted on Jun 15, 2014

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We purchased a near brand new 20Hp Mercury 4 stroke outboard motor (3hr use, the motor is pristine). The tiller will not shift into forward or reverse from neutral. What am I doing wrong?


check that there is not a shift lock to prevent accidental movement and engagement of gears
could be a button to press first or a lever to move
ring a mercury service center and ask them

Jul 08, 2018 | Mercury Boating

1 Answer

What year is a mercury 35hp outboard motor with serial number2491265.Is the motor 2 or 4 stroke


the serial number begins 2487558 and continues past 2491265 and as the beginning serial number denotes the year , your engine is 1969 model
it shows as a 2 stroke with auto oil injection
check the heads
if the plugs are in the flat of the head and there are no rocker covers it is 2 stroke
talk with a mercury /mariner service center

Sep 25, 2016 | Mercury Mariner Starter, Outboard, 35-40...

1 Answer

Where does the water discharge at on a 2000 mercury 25hp 2 stroke outboard motor?


Modern engines have a small "tattletale" discharging water out the back or side to let you know the water pump is working. The majority of the water exits thru the exhaust system to keep it cool and finally out the propeller hub when under way. There may be a small discharge out "idle ports" on the back of the motor.These relieve exhaust gas pressure when at slow speeds or not moving.

Jul 16, 2014 | Boating

1 Answer

9.9 mercury 2 stroke #1 coil green/ white or green/yellow


You have some luck looking around the Mercury section of the boating forums.

http://forums.iboats.com/mercury-mariner-outboards-25/

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1 Answer

Self-propelled mower started smoking and it was running kinda rough. Then, it started smoking more and more while the motor slowed more and more with the increasing amount of smoking until it died. It will...


not if is a 4 stroke engine not being bothered to include engine make , model year etc makes answering accurately.
you could even say the color of the smoke
so here is a generic answer ( 4 stroke )
it indicates that there is a problem in the needle and seat and there is no fuel flow control in the carby
if it is a 2 stroke with a carby --same problem
ordinary engine oil (20w-40) for 4 stroke sump) and special 2 stroke for 2 stroke engine

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1 Answer

Water cooling of exhaust


If its a newer model Mercury the Relief exhaust port does not receive water at an idle, all the cooling water is discharged through the Propeller hub exhaust and Tattletale.

Sep 20, 2009 | Boating

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