1964 Mercury 850EL, inline 6 cylinder 85 HP special tools

Mercury Outboard  general discussion

1964 Mercury 850EL, inline 6 cylinder 85 HP special tools

Postby scubapop » Fri Aug 16, 2019 3:15 pm

As a preface to my question, I want to ensure every reader that I know of the special bond between a mechanics and their favorite tools.  I also know that older merc special tools are prized possessions of the technicians who are fortunate enough to a proud owner of the “tools of the trade” from days gone by.  However, there comes a time when these beloved and cherished are friends are no longer needed and rather than hide them out in a dark and no longer utilized work shop, the time comes to pass them on to them down to the next generation where they will continue to help keep these older workhorses in the best mechanical condition possible.  By so doing, these pillars of marine history will continue to be a showcase of power for all types of watercraft for many years to come.  
Now for that  question, does anyone have any special tools for a 1964 Mercury 850EL, inline 6 cylinder 85 HP SN 1686831 that they would like to pass down?  If so, send me a PM and let’s talk and negotiate a fair sale.

Many thanks to all those who have provide answers to my previous questions.    [violin.gif]
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby Michael » Fri Aug 16, 2019 3:35 pm

if it only was that easy......a post like this shows up a couple times a year, most members here are still using their own tools

I think you would do better to tell us what your looking for so we can help you find what you need, looking for a collection to buy from a member is rare
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby 58woody » Fri Aug 16, 2019 3:46 pm

Go to: http://www.johnsmcintoshvintagemercuryo ... Tools.html
You can buy some tools there.

Get your self a good dial calliper and you can set your spark advance using a multi meter.

Dwell plates are available.

Search eBay

As Michael says, figure out what you need, you do not need them all.

It has taken me years to acquire the tools I need.
Mark 6, 1956 Mark 55 & 55E, 1959 Mark 55A, 1958 Mark 58, 1960 Merc 300, 1961 Merc 500, 1961 Merc 700, 1964 Merc 1000 Bradford, Ontario, Canada

Member of the AOMCI Upper Canada Chapter http://uppercanadachapteroftheaomci.yolasite.com/
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby scubapop » Fri Aug 16, 2019 11:25 pm

Michael and 58woody you are absolutely correct.  However, this motor is new to me and although I’ve done an extensive refurb of the externals, pressure check of the lower unit, rewired most of the power head electricals and installed new internal and external harnasses I have no history of the motor.  Other than operate it on a hard stand I have no idea how it will perform once installed on the boat and I go for WOT.  I’m just trying to look into a crystal ball as to what repairs (other than a complete power head failure) will require special tools and attempt to source them in advance.  
Based  on experience does anyone have any suggestions as to what special tools are most likely to be needed for repair actions on a 1964 Mercury 850EL, inline 6 cylinder 85 HP
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby 58woody » Sat Aug 17, 2019 6:05 am

Let me say this, sorry if it sucks.

If you want 100% knowledge, understanding, forget the last 60 years.

Rebuild it from the crank up, get the parts and buy the tools as you go.
Now you will have history and understanding.

Otherwise you have fixed the surface and will never know until you run it.
It may exceed your expectations or fail.

I just shared some tools you need, everyone can do with less or more.
There is no answer. Some will use 6 ring compressors some will use one.
Mark 6, 1956 Mark 55 & 55E, 1959 Mark 55A, 1958 Mark 58, 1960 Merc 300, 1961 Merc 500, 1961 Merc 700, 1964 Merc 1000 Bradford, Ontario, Canada

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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby scubapop » Mon Aug 19, 2019 1:50 pm

58Woody, thanks for your input----point well taken!! [violin.gif]
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby Hank1995 » Tue Aug 20, 2019 8:09 pm

I have duplicates of some of those x degree before TDC tools (or rather how far the piston is dimensionally from TDC). I hardly need one much less two. Let me know. Also wouldn't it be better to figure out where you're supposed to be BTD, mark the flywheel accordingly and use a timing light?
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby 58woody » Wed Aug 21, 2019 4:09 pm

This process has not failed me yet:

1 - Line up the straight mark (timing) on the fly wheel with the arrow on the pulley.

2 - Make sure the distributor is turned clockwise towards the block

3 - Use a dial calliper in the appropriate cylinder and find top dead center (TDC)

4 - Insert a .235 timing tool, carefully touch the top of the piston. Rotate the flywheel clockwise 1/4 turn. Depress the timing tool and turn 90 degrees without moving the position of the tool. Now .235 has been set.

5 - Turn flywheel clockwise until the piston touches the tool (it will stop). .235 before top dead center.

6 - Hook your multi-meter to the positive distributor wire and to the ground wire to the block (the 2 wires from the distributor should not be connected to the block side terminal)

7 - Rotate your distributor counter clockwise until your meter jumps

8 - Set your spark advance screw on the distributor tower. Adjust so it touches the distributor wall to keep it from turning further. Lock the screw with the nut.

9 - You think your done, redo the above steps and make sure when the distributor hits the screw the meter jumps

Your done. I use a dwell meter to set my points on these distributors to 90 degrees (I do not use shims).

My 700 starts on the first turn of the key.
Make sure your starter is well serviced and performing properly, they can cause starting issues if they are not and wreck batteries.
Mark 6, 1956 Mark 55 & 55E, 1959 Mark 55A, 1958 Mark 58, 1960 Merc 300, 1961 Merc 500, 1961 Merc 700, 1964 Merc 1000 Bradford, Ontario, Canada

Member of the AOMCI Upper Canada Chapter http://uppercanadachapteroftheaomci.yolasite.com/
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Re: 1964 Mercury 850EL, inline 6 cylinder 85 HP special tool

Postby 58woody » Wed Aug 21, 2019 5:58 pm

Use the appropriate timing tool for your motor.
Mark 6, 1956 Mark 55 & 55E, 1959 Mark 55A, 1958 Mark 58, 1960 Merc 300, 1961 Merc 500, 1961 Merc 700, 1964 Merc 1000 Bradford, Ontario, Canada

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