1962 Sea King 15hp wont pull

[aeviaanah]

I received a 1962 15hp 2 stoke outboard from a friend for free. He recently serviced the engined, cleaned components replaced sparkplugs etc. He had it running for a bit, came back the next day and it had seized up on him.

It isnt worth what it would cost a mechanic to perform diagnostics. I am not too motor savy and would like to use this to learn a bit, even if I never get it running. I am thinking since it wont pull, something in the engine itself has seized.

I guess my next step is to figure out what has seized and if its able to be fixed. I have removed the pull starter housing, there is a 3/4" nut on top of a bolt which is holding down the flywheel. It seems the flywheel should be able to come off but wont budge. Any suggestions?

Can anyone point me in the right direction to get this thing running? Resources? I dont need a step by step guide but something so I can start asking the right questions.

 

[aeviaanah]

Re: 1962 Sea King 15hp wont pull

I have sure learned alot since starting this project. After looking at this I think I have a general idea...

The pull start turns the magneto which generates spark to plugs and initiates combustion.
Combustion turns crankshaft which turns magneto and generates spark for the next stroke.
The fuel line runs to the fuel pump and out to the carburetor, I think the carb regulates the amount of fuel/air?
The fuel and air move through the engine to the pistons, combustion occurs and exhaust runs through and out to lower unit?

This may seem basic to most but It is what I have gathered in the last few hours. I can read read read but until i get dirty I wont absorb anything. Learning all this will make me more confident to service my new 2011 Mercury 4stroke.

Today, I removed the flywheel. At first I was trying to remove magneto to get to motor but after a second look I dont think I need to, to get inside motor. Looks like the bolts running through the motor housing (under the motor) need to be removed so I can raise the motor out from the motor housing. I can then get to the panels that are bolted to the motor.

Should I just start taking panels off, how would I identify what is seized?




Today I also removed the lower unit, this gave me a good idea of how the water pump works. Its in pretty good condition, could just use some cleaning. The oil will need to be replaced in gear case. I also see how the gear shifter connects to the gear case.



Here is something I have a question on...what exactly does this adjustment do? Does it adjust the throttle idle limit?

 

[twocyclemania]

Re: 1962 Sea King 15hp wont pull

I have the identical motor and it's a fantastic runner. First, you've got to stop drinking so much coffee. You're getting ahead of yourself. Don't take this motor completely apart or you'll land up with a pile of junk; especially if this is your first time. The picture of the coils tells you a no-brainer. They need to be replaced. They're original and those old 'pink' coils on any motor of that era have outlived their life expectancy. Replace the coils once you free the motor up; if you do. You never mentioned if it seized while running. If so that indicates a lack of oil. If that happened you may still be okay as long as you haven't scored the pistons or cylinder walls. You probably can live with real light scuff marks. If they're okay I would put some penetrating oil in the cylinders and let it sit for a while. There are also a number of concoctions and home mixtures out there that do the same thing but you'll have to look them up on the internet. Allow a couple of weeks at least. If this doesn't work you can remove the carburetor and intake (easy job) which exposes the crankshaft counter weights. I've used a teflon/plastic pin and hammer to tap on a number of motors (crank counter balances) and this has worked in freeing the cylinder up. For now; don't disassemble any more. Get the motor loose. Replace the head gasket since you've taken the head off and get rid of those dead coils. Dress the points and you you should have a great bullet proof motor. Of all the motors I run this and my 18's are my favorites. Good luck!

 

[aeviaanah]

Re: 1962 Sea King 15hp wont pull

I have the identical motor and it's a fantastic runner. First, you've got to stop drinking so much coffee. You're getting ahead of yourself. Don't take this motor completely apart or you'll land up with a pile of junk; especially if this is your first time. The picture of the coils tells you a no-brainer. They need to be replaced. They're original and those old 'pink' coils on any motor of that era have outlived their life expectancy. Replace the coils once you free the motor up; if you do. You never mentioned if it seized while running. If so that indicates a lack of oil. If that happened you may still be okay as long as you haven't scored the pistons or cylinder walls. You probably can live with real light scuff marks. If they're okay I would put some penetrating oil in the cylinders and let it sit for a while. There are also a number of concoctions and home mixtures out there that do the same thing but you'll have to look them up on the internet. Allow a couple of weeks at least. If this doesn't work you can remove the carburetor and intake (easy job) which exposes the crankshaft counter weights. I've used a teflon/plastic pin and hammer to tap on a number of motors (crank counter balances) and this has worked in freeing the cylinder up. For now; don't disassemble any more. Get the motor loose. Replace the head gasket since you've taken the head off and get rid of those dead coils. Dress the points and you you should have a great bullet proof motor. Of all the motors I run this and my 18's are my favorites. Good luck!

Hey thanks for the informative post. I will definitely slow down on this. You are right, I do drink too much coffee.

The motor seized up the day after the previous owners got it to run, I recently found out they were using 50:1 ratio. This motor calls for 24:1. This tells me the motor was over heating, it cooled down and seized up. Ive had penetrating oil on the pistons for a few days now. After I allow a few weeks for penetrating oil to work, how would you recommend getting that punch to freeing up the pistons? Id like to try anything before taking the carb off.

I notice the upper piston soaks in oil while the lower one pools up...Im thinking its the lower one that is seized.

Removing the lower unit ruled out the gear case. Thanks for slowing me down on this...I wont be taking motor apart. Please stick around to help me out with this.

 

[twocyclemania]

Re: 1962 Sea King 15hp wont pull

I've used another method to free a stuck motor and since you have the lower unit off this may work. I placed the drive shaft back into the (upside down and down on the ground) power head and gripped the shaft with locking pliers and hit the pliers with a hammer. Don't be a cave man when you hit it. Others may have other methods but these are two I've used. Otherwise, removing the carburetor and intake is not too involved. This will take you to the crankshaft where you can use a wood or plastic 'punch pin' and hammer. Others may have other methods so hopefully someone more knowledgeable may have other ideas. You can also take the side plates (start with the one cylinder that's not taking oil) off and add lube there on the side of the piston if it's in such position. If the piston is in position you can see in that limited area if any damage is done. If it wasn't run long (like a few minutes in a barrel) it has a good chance of being okay. In fact I'm surprised that it seized if this was the case. ps that last picture is indeed an idle adjustment. Leave it alone for now; you have other pressing needs. This can wait (again take it easy on the coffee). If you get everything solved check out the water pump and impeller before re-connecting the lower unit. Good luck and let me know how you make out. Oh, one more thing; don't ever ever ever try to loosen up stuck motor by a wrench/socket on the flywheel nut. You'll snap that end of the crankshaft in a heart beat.

 

[Willyclay]

Re: 1962 Sea King 15hp wont pull

Can anyone point me in the right direction to get this thing running? Resources? I dont need a step by step guide but something so I can start asking the right questions.

Your MW Sea King was built by OMC and should equate to a Gale model. For ordering parts, you will need the model number. Try the link below for a free online "non-factory" service manual that should cover your motor. FYI, I used an identical manual for my first complete outboard overhaul of a motor that was also seized when I got it. While this manual is not as complete as a factory version, my motor started and ran on the first crank after reassembly. Good luck with that great old motor!

http://forums.iboats.com/showthread.php?t=393281

LOGIN as directed then drill down to: Small Engines, Marine/Boat Motors, Gale; 12, 15, 18 & 20 HP and Condensed Service Data. You can find your model number and cross-reference it to Gale models by looking under Sea King.

 

[aeviaanah]

Re: 1962 Sea King 15hp wont pull

I've used another method to free a stuck motor and since you have the lower unit off this may work. I placed the drive shaft back into the (upside down and down on the ground) power head and gripped the shaft with locking pliers and hit the pliers with a hammer. Don't be a cave man when you hit it. Others may have other methods but these are two I've used. Otherwise, removing the carburetor and intake is not too involved. This will take you to the crankshaft where you can use a wood or plastic 'punch pin' and hammer. Others may have other methods so hopefully someone more knowledgeable may have other ideas. You can also take the side plates (start with the one cylinder that's not taking oil) off and add lube there on the side of the piston if it's in such position. If the piston is in position you can see in that limited area if any damage is done. If it wasn't run long (like a few minutes in a barrel) it has a good chance of being okay. In fact I'm surprised that it seized if this was the case. ps that last picture is indeed an idle adjustment. Leave it alone for now; you have other pressing needs. This can wait (again take it easy on the coffee). If you get everything solved check out the water pump and impeller before re-connecting the lower unit. Good luck and let me know how you make out. Oh, one more thing; don't ever ever ever try to loosen up stuck motor by a wrench/socket on the flywheel nut. You'll snap that end of the crankshaft in a heart beat.

twocyclemania, thanks again for the response. Ill give your ideas a try after taking off carb and intake and hitting crankshaft. Ill be sure not use the flywheel nut as a way to unseize the motor.

 

[mrcrabs]

Re: 1962 Sea King 15hp wont pull

you could take a old serpentine belt and cut it to size of the flywheel and fit it to a hefty piece of wood like thick old broom handle or 2x2, bevel one side and presto you have a flywheel grabber holder piston unsticker oh yeah , and put some SAE 30 in the jugs



I sure don't recommend hitting crankshafts unless its been really bad, I mean how would you like to be hit for no good reason or for something someone else done

 

[Steve A W]

Re: 1962 Sea King 15hp wont pull

aeviaanah
Here's some reading that will help;
http://www.precisionservoutboard.com/Information/ArtsFivePointPlan/tabid/65/Default.aspx

http://forums.iboats.com/showthread.php?t=158086

http://www.duckworksmagazine.com/07/columns/max/articles.htm

Older OMC motors are a good way to get into the hobby.
Good Luck.
Steve A W

ps. The way You go through the coffee, You'll have all this read in no time! LOL

 

[aeviaanah]

Re: 1962 Sea King 15hp wont pull

aeviaanah
Here's some reading that will help;
http://www.precisionservoutboard.com/Information/ArtsFivePointPlan/tabid/65/Default.aspx

http://forums.iboats.com/showthread.php?t=158086


http://www.duckworksmagazine.com/07/columns/max/articles.htm

Older OMC motors are a good way to get into the hobby.
Good Luck.
Steve A W

ps. The way You go through the coffee, You'll have all this read in no time! LOL

Steve, thanks for the links. I read the first two already, ill need a bit more time for the duckworks. Great information over there. Ill be sure to look it over tomorrow. Thankyou!



Update, so i couldnt free up the motor from the pistons or from the small view of crankshaft through the intake manifold. I ended up splitting motor in half. I have got the pistons out everything is in pretty good condition except for piston rings and a bearing. Hopefully I can find replacement parts for this model. Any suggestions? Ill go ahead and start a thread for that.

...a few parts need to be replaced before I reassemble.

-piston rings (i was told to always replace these) piston rings where stuck to piston
-one crankshaft bearing

i was also told i need to address the crankshaft a bit when i buy the new bearings. polish it out. i also need to rehone the lower cylinder.

I just sprayed everything down with degreaser and am getting ready to do the first pass of cleaning the parts.