57 sea king leaking fuel from exhaust/wont start

[TBradymn86]

I have a 57 12hp sea king model GG8971A. I've replaced the cracked coils, new plugs and plug wires, new condensors and contact points set to .020. I have spark to both cylinders. When i prime the fuel bulb, i can hear the fuel flowing through the carb, and i noticed the spark plugs are wet w/ fuel in the cylinder. After pulling the pull start a few times, i noticed fuel/oil leaking from the lower unit exhaust port. I also disassembled and cleaned the carb and float assembly as well, and the motor popped twice out of 20 pulls or so. Still won't turn over though? Possible fuel pump issue maybe? Any input would be appreciated. Thanks. ps: I'm new to iboats and this is the first outboard i've tore apart lol.

 

[64osby]

Re: 57 sea king leaking fuel from exhaust/wont start

First question would be did you do a compression test.

Fuel out the port and wet plugs say it's not a fuel pump issue.

Maybe flooding? Or weak spark.

 

[F_R]

Re: 57 sea king leaking fuel from exhaust/wont start

Agreeing with 64osby, except it COULD be the fuel pump----if the diaphragm is ruptured. That allows raw fuel to gush right into the cylinder. Wouldn't be unheard of in a 55 year old motor. Remove it from the motor (hoses still attached) and give the squeezer bulb a pump. Does gas squirt out the backside of the pump? If it does, the diaphragm is shot. If it is the origninal pump, it is not repairable. Get a new one here at iboats

If all that checks out, you may be flooding it. Perhaps you have the carb needles open too far? 3/4 turn max on the high speed and 1 1/2 on the slow speed should get it started. If flooded, try turning the high speed almost off till it clears out.

You also could be overpowering the float valve when squeezing the bulb. Or the float valve may be defective.

You do have the throttle set properly for startup---don't you? Proper position is in neutral gear, then turn throttle as far toward "fast" as it will go in neutral. Don't pay much attention to the words by the twist grip. They usually are off by about a mile.

Lastly, the motor may just be sick. How's the compression? And is the spark as good as you think it is? Wires on correct plugs?

 

[TBradymn86]

Re: 57 sea king leaking fuel from exhaust/wont start

64osby what exactly do u mean compression test?? the prop turns a bit when i pull the pull start if thats what you mean?? sorry lol. like i said this is my first outboard i've tried to bring back to life, and everything i've done so far i've learned from these forums, so i know there is an answer to the problem....just gotta find it!!!! thanks for the response also.

 

[TBradymn86]

Re: 57 sea king leaking fuel from exhaust/wont start

F-R thanks for your reply. I'll test the fuel pump after work today and check that scenerio out. I'm sure the needles in the carb are probably set wrong also haha. the spark is good to go; bright blue and snappy. i always tried to start it in the startg position on the handle, good to know that the handle could be off. the float valve seemed normal to me when i disassembled the carb and cleaned it. the float moved freely up and down allowing the needle valve to slide in and out of the housing correctly i believe. Thanks again for the reply i'm amazed at how much knowledge is on these forums. It's great. I also have a eska 7 hp ted williams that runs and an unknown clinton chief that i'm working on also. keep the info and ideas comming though. I'll post the results tonight. THANKS!!!!!!

 

[jim j geezer]

Re: 57 sea king leaking fuel from exhaust/wont start

You've got yourself a HORSE of an outboard! Keep posting & asking questions, since, frequently, one question leads to another.
Cylinder compression test:
http://answers.yahoo.com/question/index?qid=20080321023347AA3XksV

^^That^^ kinda gives you an X-ray into the engine's innards: pistons, rings, cylinder walls & head gasket.
You're looking/hoping more for MATCHING readings rather than high readings.

 

[captk]

Re: 57 sea king leaking fuel from exhaust/wont start

Does a 1957 seaking have a fuel pump, or does it require a 2 hose pressure tank?

 

[64osby]

Re: 57 sea king leaking fuel from exhaust/wont start

A 57 OMC would have a pressure tank, not sure on a Gale. That's a question for the master F_R. He also did state earlier that it would have one.

TB86 - Compression is required to compress the gas/air and ignite it. Motor with low compression may or may not run. If they do run they won't run well. If the piston rings are bad or a cylinder is bad you will not have compression. It can also be caused by a bad head gasket.

This http://www.harborfreight.com/flex-drive-compression-tester-92697.html is a compression tester. It screws in the block. It will tell you if your cylinders are good.

If you have good numbers, above 70 LBs and within 15% of each other you should be okay, you are good. If one or both show low numbers it is time to remove the head and take a look.

 

[ronboonville]

Re: 57 sea king leaking fuel from exhaust/wont start

check the hose that goes from the fuel pump to the other side of the engine to make sure it doesn't have a rotted spot on the bottom side where it can't be seen.

 

[robert graham]

Re: 57 sea king leaking fuel from exhaust/wont start

Sounds like a carb float with a hole in it or a faulty float needle valve/seat...and it's just flooding the motor!

 

[robert graham]

Re: 57 sea king leaking fuel from exhaust/wont start

It may help to install a gas petcock/cut-off valve(if it don't have one) on the fuel line to prevent motor from flooding with gas...once it's got lots of gas in the crank area, it'll just keep fuel-fouling plugs as fast as you can pull 'em out and dry 'em off!.

 

[steelespike]

Re: 57 sea king leaking fuel from exhaust/wont start

If you disconnect the fuel line after you squeeze the bulb just till you feel light pressure it may keep it from flooding
enough to see if it will run.
Brass carb floats sometimes get a hole and fuel gets inside. There are a number of ways to get the fuel out but I don't
recommend drilling a hole, to hard to solder with pressure building from the heat.