Need a free manual for 1966 Mercury 3.9 hp outboard motor.

Question edited for a lot more clarity and correct spelling of the maker.

Owners Manuals - Mercury Marine

http://www.mercurymarine.com > land > owners-manuals
To easily access an Owner's Manual with consolidated information specific to your Mercury engine - agree to the terms and fill out the form below.

Mercury Outboard Service Manual Free Download PDF

https://www.downloadboatmanuals.com > motors > mer...

On this page you can free download more than 80+ operation, owner's, maintenance manual, service and repair manuals for Mercury outboard motors in PDF.

mercury 20 hp outboard manual for sale - eBay

https://www.ebay.ca > sch

1997 Mercury 20 HP 2 Stroke Outboard Shop/Service Manual on DVD! Brand New ... Mercury 200 Outboard Motor Parts Manual - 20 HP - 1976 - 3537531 & up.

Mercury Outboard 20 HP (1972 - 1989) - Haynes Manuals

https://haynes.com > en-us > mercury-outboard

This Mercury manual is 368 pages. QUICK REFERENCE DATA. CHAPTER ONE / GENERAL INFORMATION Manual organization / Notes, cautions and warnings / Torque ...

Mercury 2-Stroke Outboard Boat Motor Service Manuals PDF ...

https://mercury-2-stroke.marineservicemanuals.com Mercury 2-Stroke Outboard Boat Motor Service Manuals for only $5.95! Mercury 2-Stroke Outboard Boat Motor service manuals are available for immediate download!

there is a pump for sale on e-bay --seller is western furniture (1918) used condition for $25.00 us 2 people watching it but it has a buy now tab
I found this by going google and typing in --fuel pump for mercury outboard motor 3.9 hp-- and the site is www.ebay.tv>sch>ebay-motors-
mariner is also a part of the mercury range so check for mariner 3.9 or 4 hp parts

Mercury Outboard Fuel Pump - Mercury Outboard Forums

forums.iboats.com/Mercury-Outboards/Fuel-Pump

5, 2004 Mercury 225 four-stroke EFI no power to Low Pressure fuel pump. Why please help · Mercury & Mariner Outboards. 13, Mercury 850 (85hp) - Gas pumps through the top carb - Failed fuel pump? ... 1, 1969 7.5 H.P. Mercury (Bad fuel Pump)? ... 1971 · 1972 · 1973 · 1974 · 1975 · 1976 · 1977 · 1978 · 1979 · 1980 · 1981 ...

Fuel Pump Diaphragm replacement Mercury outboard 110 ...

? 4:18
https://www.youtube.com/watch?v=vufekxTVZd8
Jun 22, 2012 - Uploaded by Brad Clark
My last test run of this motor lead me to believe I had fuel pumpissues...so in ... Mercury 9.8 h.p. 110 Outboard Motor WaterPump Repair and ...

How to remove the lower unit on a Mercury outboard motor ...

clean carbs or injectors and fuel filter and tanks !

replace it as sounds like valve gone !

This is probably a Merc 400 and you can remove the upper cowling and rope start it if you do not have the rope starter already attached. As I recall, all of this class motor were manual start with optional electric start, so thy came equipped with pull starters.

If the motor will not turn over manually then it is likely seized or frozen up and requires professional help. I have worked on numerous Mercs from 5 to over 100 HP and every one would turn over by pull starting if they were mechanically sound.

fuel goes in at connector then to fuel pump then to carbs ! remove connector off fuel line and prime fuel up so you know you got fuel ! then reconnect to engine and prime up again till you see filter filling and bulb should harden , then remove a drain screw from carb bowl and prime again and see if fuel comes out of all carb drains ! if yes then start engine with or in water with kill lanyard on if ok then good ! not then check sparks on all plugs putting them against the head for earth and crank to check ! if ok then i would remove carbs and clean the jets etc ! compressions 100psi or more on all cylinders ! less means recon pistons etc !

I have the same motor, and the original manual.

The mixture is 50:1. Everything else will destroy your motor. Mercury has a toll free number, call there in case you still have doubts.

You can seize the bearings real quick with starting fluid. You found out it has spark. Now you need to find out if you are getting fuel. Some of the gas tanks have a strainer and you need to pull the gas gauge from the tank and check the bottom of the tube for the strainer. If it is clean follow the fuel line up into the motor to the fuel pump. There may be a strainer inside the pump. If this is clean reassemble everything. With the gas line disconnected from the motor pump the bulb. Use a ballpoint pin on the checkball and see if gas will flow. Reconnect everything and pump the bulb, it should remain filled and hard. Now choke the motor and pull the starter. It should try to start. Aside from fouled plugs and bad gas if it hits with starting fluid it should run.