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The maximum speed of the 125 Mercury is dependent on the boat it is on. It can only push some boats 2mph, while other boats that are light and have a small wetted surface can run 60. To find the theoretical maximum, you should find the maximum pitch prop offered for that engine. The maximum pitch prop I can find for that engine is a 24p. The gear ratio for the lower unit is 2.07:1 . If you can turn the 24p prop at the maximum recommended rpm 5250, the fastest the boat could possibly run is 57.1 mph. The propeller is not 100% efficient, so you should factor in the slip of the propeller. With the inefficiency (slip) factored in, the boat would be more likely to run 55mph. If you can find a higher pitch prop for that engine, you can get it to run faster speeds. A 27p prop would run about 60mph.
What else can I help you with?
Where is VIN on mercury outboard motor?
location of VIN # on a 1999 Tracker boat motor?
What is the fuel mix for a 1999 mercury 15hp outboard motor?
50 to 1
How much does a 1999 25 hp mercury outboard weigh?
The label on my 1999 Mercury 25hp outboard says the dry weight is 114 lbs. Doug, So. California
What is the fuel mixture for 1999 25 hp mercury outboard motor?
i have a 1999 25 hp merc motor used i and i have asked the dealer close to where i live and they said to mix 50/1 . so that's what i have been using / with no problems
What is weight of 1999 200 hp Mercury outboard?
420 lbs
What is the proper fuel oil mixture for mercury 5hp outboard?
I have a 1999 Mercury 2stroke 5HP outboard and the owners manual states 50:1 Gas/Oil mixture.
What spark plugs and plug wires for a 1999 mercury 90 hp outboard engine?
The 1999 model, 90 hp Mercury outboard requires an NGK BUHW-2 spark plug, standard plug wires are acceptable.
What spark plug goes in a 1999 mercury 125 hp Outboard?
ngk bp8h-n-10
Can i replace the hydrauylic fluid in the ram of a 1999 40hp outboard motor?
No, you are too dumb to know how.
What is the fuel mixture ratio for a 1999 50 hp Johnson outboard motor?
50 - 1
What type of motor oil should be used in a 1999 mercury sable?
According to the 1999 Mercury Sable Owner Guide : ( 5W-30 )
How many quarts of oil 4.6 litter motor for a mercury grand marquis 1999?
( 5 quarts with filter change ) according to the 1999 Mercury Grand Marquis owners manual
