Mercury 1150 need a service manual

[mycapricess]

So i picked up a 1967 Glastron with a 1972 Mercury 1150 on the back. Boat has not seen the water since 1998 and has been sitting in a barn since. I cleaned the carbs rebuilt the fuel pumps put in a new impeller,repaired all the old wiring under the cowl and put on a NOS Merc distributor cap. Now the issues start. The boat will start and run perfectly when on the hose or in a barrel. But the second i put it in the water I cannot get it into gear just stalls when you try. It looks like someone has mess with timing on the boat before. I have found videos on setting the timing but no service when i am at the camp.

I would love to find a service manual that cover the motor and has the procedure in it. Also i am working on a merc 850 with the same electronics and would hope that would info on testing the stator for correct voltage output. Any help would be appreciated. The serial number on the boat is 2932877

 

[The Force power]

Check compression & Spark on all Cylinders
Sounds like she's not running on all; do a drop down test by unplugging one spark plug-cable at the time & check for RPM-drop


Here's a link that covers all the motors you're working on; print everything you need before it disappears (you'll have to enable flash player)

http://www.boatinfo.no/lib/mercury/m...40-115.html#/0

 

[Chris1956]

Do a link and synch. Timing is 4-6* BTDC for idle pickup and 21* BTDC for max spark advance.

On those Mercs, if you set the carb mixture for best idle, they are too lean to allow acceleration. You mist richen it up.

 

[mycapricess]

Doing the link and sync this weekend. Have pulled plugs and checked them all look good. Will double check mixture screws. I out them at 1 3/8 since that's were they were when I pulled them out. Will fatten it up a bit and report back.

 

[Chris1956]

Usually you start at 1-1/2 turns open on all carbs.

If that motor stumbles or dies when accelerating, open top carb screw 1/8 turn. Retest. if still stumble open mid carb 1/8 turn, repeat with bottom carb, then top-mid-bottom carb sequence, testing acceleration after each adjustment.

Try to find good, smooth acceleration, and acceptable idle quality. RPM will be about 700-900 in neutral. Adjust idle stop screw and throttle cable if necessary to get idle speed correct.

 

[Faztbullet]

Test compression before you put anymore effort or $$$ in it !!! If its not 125psi + motor will have low end problems

 

[mycapricess]

Compression was tested before I spent any money on parts 145 in all 6. Motor has very low hours. Nothing since 98 and minimal before that. Has always been a garaged boat in upstate NY.

 

[The Force power]

A manual is a must, if your timing and/or primary/ secondary pick up has been messed with

 

[mycapricess]

So did the link and sync according to the you tube video and it's even worse. Looked in the service manual shared here but it does not cover a 7
1972 1150 motor. Anyone have the procedure for it?

 

[Chris1956]

I would expect a '72 to be a standard battery-CDI distributor ignition system. So...

Remove all spark plugs and stick a screwdriver into top cylinder and set it to top dead center. Look at the timing decal and timing pointer (if you have one), to see that the motor reads TDC.

Older motors had timing marks on the cowling support, instead of a timing pointer. If you have those, use them for timing.

If you have a timing pointer and it is out of adjustment, measure from spark plug hole to top of piston. Add that number to .464 inches. Turn motor until piston well before TDC. Now stick the ruler into the spark plug hole and set it to the sum of the distance from the spark plug hole to the piston top plus .464 inches. Turn engine until piston touches ruler. Adjust timing pointer to read .464 BTDC.

A dial indicator is the most accurate way to do this. A caliper is good to .001 inches, and works well, but a steel ruler can do it fairly accurately as well.


The rest is the same for all battery powered CDI distributor ignitions.

Install #1 spark plug and wire. Install the other plugs into their wires and tape 'em together and ground their bases to the block.

Install a timing light on #1, remove the prop. Put motor in gear.

jumper the starter solenoid, ignition on and read timing light. Set throttle until timing shows 4-6* BTDC.

Now look at carb throttle plates. They should be closed, but ready to open. If not, loosen two bolts on plate about 1/2 way up distributor body. It needs a 5/16" wrench. Rotate collar until carbs are ready to open and tighten bolts.

Now advance throttle full and jumper starter solenoid. Using max spark advance set screw above distributor, adjust max spark advance to be 21* BTDC. Tighten set screw. You may need to loosen throttle stop screw to make that happen.

Now set throttle to open carbs just to their stops. Tighten throttle stop screw at that point.

Set carbs to 1-1/2 turns open, install all spark plugs and wires. Start motor on flusher and adjust idle stop screw to give about 900-1000 RPM in neutral. You may need to adjust throttle cable barrel nut to make this happen.

Now you need to water test and do final adjustment on carb idle mixtures.

 

[mycapricess]

Correction according to the serial number the motor is a 1970. Also my timing marks are on the cover not the flywheel. The tough part is the sticker has no number or lines from 15 to 25 degrees so I gotta guess we're 21 is. That's why I'm thinking this motor is different then later 115hp motors