1970 Sea King 55hp outboard

smallieguy

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Jul 27, 2009
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Hello, I recently purchased a 15.5 fiberglass boat with the engine size above.Got the boat a few weeks ago and have taken it out fishing 6-7 times. One thing(there are two) myself and a fishin bud of mine have noticed is that it is using/burning up ALOT of gas for some relatively short trips on the lake. It has a 6gal tank. I am putting in the correct ratio of marine oil(50:1)and the engine runs very smooth. I replaced the plugs also. Just to give everyone an idea,I top off the gas and according to my handheld gps,go about 1.2 to 2 miles per trip. We usually get to a spot, drift for a bit,start up again,drift again and head in. The engine isn't running long enough to come back with 2-2.5 gallons left. Is that a normal consumption? I have noticed upon starting that the flap on the carb flips up and stays open(Iam thinking that is where the problem lies) I cant get it to close.Is it supposed to stay flipped up(open)? Also,I have notice what appears to be gas(maybe oil) slowwly dripping(then stops) out of one of 2 very small holes on the lower-end unit.The holes are side by side. Is that some type of drainage outlet. ? Do I need to get some type or ring to seal it? I checked and replaced the gear lube and everything seems to be fine there. Any info would be very appreciated. I figured now that I am a new owner of a very OLD boat, I should get tied in to a very impressive site like this. Thanks, Patrick
 

Turn4fun

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Jul 25, 2009
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Re: 1970 Sea King 55hp outboard

Those holes are a drain and need to stay open. The oily leakage is unburned fuel/oil from the puddle drain on each cylinder and is normal. If it's excessive you are probably running too rich which would account for heavy fuel consumption too. The open flap on your carb is the choke plate. This would only be closed when you choke the engine when starting cold, and should be open the rest of the time.
 

smallieguy

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Jul 27, 2009
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Re: 1970 Sea King 55hp outboard

T4F,I appreciate the informative reply. What do I need to do now so she isn't running so rich?
 
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