I have a 1977 Mercury 1150.
Quick summary.
1. I have had the motor since 1981. Always used in a freshwater Florida lake.
2. Motor sat unused for @ 15 years until 2014 at which time it was serviced for use by a mechanic who knew old mercs. Motor runs fine and at the proper temp.
3. When I run...
My motor runs fine so this is just an academic question. Why does my timing decal have the thick black mark for TDC at 1* BTDC instead of on 0*. I tried to upload a pic but can't for some reason today. Merc850 has a post on the forum that shows his decal. Mine is identical.
Thanks,
Kevin
My 1977 Mercury 1150 trim cylinder is leaking out of the piston rod at the retaining cap. My trim has the 3/4" piston rods. I know this is probably just the 3/4" o-ring in the cap.
Should I just find an o-ring locally to replace the one that leaking or buy the Mercury kit and replace them all...
Chris,
I ended up calling Sierra's technical department yesterday and was told they do not make a coil that crosses with mine. He looked up the Mercury number as well as my motor and said it was a no go. I ended up buying the Mercury coil. The Sierra number I gave above looks just like it but...
I need to replace the coil on my 1977 Merc 1150. The current Merc number is 332-4985T 2. I can not find a Sierra coil that crosses with that number. Sierra 18-5186 crosses with Merc 339- numbers. Has anyone used the Sierra 18-5186 on an inline 6 motor? If not I'll bit the bullet and purchase the...
Well for some reason I didn't notice the center hole where the carbon button goes is partially broken off. There was no plastic in the cap so it has been like this for a long time. Should I go ahead and replace it or will the carbon button stay put. I sure don't want something coming loose and...
1977 1150 S#4689451
I was doing some troubleshooting and was going to remove my distributor cap to make sure it is clean and the carbon button is in tact and I have two issues,
1. When I went to unplug the coil wire from the coil my hand pushed against #2 plug wire and it fell out of the...
Motor: 1977 1150 S# 4689451
Per the title last fall the motor started to suddenly shut off while under way. By shut off I mean like the key is turned off. No warning, no sputtering, nothing. Just dies. It is totally random and has happened at various speeds. It always starts right back up...
I am installing a new external harness on my 1977 Mercury 1150. The wiring in the control box is shot also so I want to desolder the old wire connections and solder in the new.
Questions:
1. Is 60/40 rosin solder what I should use?
2. What type of flux is best?
The mechanic that was going to...
I am installing a new external wiring harness on my 1977 1150. I am about to wire the new harness into the control box and have noticed that the old harness had the brown tachometer wire directly connected to the male tachometer plug (the 3 pin male side that mounts in the box). The existing...
I am replacing the the motor side and boat side wiring harness on my 1977 Merc 115HP Inline 6 (1150) S# 4689451and would like to know if there is any quality difference between the harness made by CDI and the one made by Sierra?
Thank you,
Kevin
I am replacing the wiring harness on my 1977 Merc 115HP Inline 6 (1150) S# 4689451and would like opinions/experiences/advice regarding the following questions.
1. Is there any difference in the OEM vs CDI vs Seirra wiring harness?
2. Does the CDI external harness come with "heat shrink tubing"...
