Possible fouling?

[maddydogg]

I am new to boating, that being said I am having trouble with my 1995 Mariner 9.9. I am using 50:1 mixture of TC-W3 oil with 87 octane fuel, the previous owner said to use 40:1 but that seemed to be wrong upon doing some due diligence. It smelled like it was running very rich, and would occasionally bog down when trying to accelerate, although it ran awesome when wide open. Today after very low speed operation(due to how early it was as to not wake people) I saw a small amount of oil hitting the water, from the exhaust. I went to go out again this evening and she would not even turn over, and it still wmelled very gassy. popped the top and the carb intake was very wet, and again saw oil splatters on the water when trying to start her. I am kinda lost right now, while waiting for a repair manual. Anyone have any thoughts of feedback.

 

[maddydogg]

Re: Possible fouling?

Sorry I wanted to add the serial number OGO43703.

 

[Plainsman]

Re: Possible fouling?

Maybe a stuck float? Are you getting a good spark?

 

[maddydogg]

Re: Possible fouling?

It sputtered for two seconds when I tryed to go out this evening, thats it. I am unsure of how to check the spark, but it seems to be getting one.

 

[Plainsman]

Re: Possible fouling?

You can get a inline spark tester at an automotive store.

 

[Silvertip]

Re: Possible fouling?

Won't turn over means the engine can't be rotated. Won't fire means it cranks but won't start. It needs fuel, air, compression, and spark and it all needs to happen at the proper time. Spark is easy to check. Remove the spark plug, Leave the wire connected. Hold the metal part of the plug against the engine (ground) and pull the cord. It should exhibit a good snap with a blue spark. Check the other cylinder in the same way. If spark is good, you probably have a fuel issue. Gummed up carb is the likely culprit. Improper storage with unstabilized fuel is the reason fuel systems get gummed up. The carb needs to be removed, disassembled, soaked, thoroughly cleaned (all passages, jets, etc) and then reassembled using a new kit. A stuck needle and seat can also cause a flood condition as fuel doesn't get shut off when the float bowl is full.

 

[maddydogg]

Re: Possible fouling?

Thank you, the problem is that it will not fire. I thought it was a fuel issue, I will test the spark plugs today. Sorry for the ambiguity of my words I am very new to this and appreciate the patience. When I bought the engine it still had the tag on it from winterizing in 03. I have run one tank of gas through until now.

 

[Silvertip]

Re: Possible fouling?

If you don't have spark, simply replacing the plugs is not the solution. Make sure the kill switch (if there is one) has not been activated. Lack of spark is an electrical issue -- not a spark plug issue. Did you overheat this engine by any chance. When it ran was there a good stream of water from the tell-tale? If not, you need a water pump. If it was overheated you might check compression.

 

[maddydogg]

Re: Possible fouling?

There was water from the tell tale. When trying to start it would just sputter for 5 seconds or so before dying, with an very strong smell of gas, which leads me to beleive it is a carb issue. I was out trolling yesterday for an hour or so and originally thought I may have fouled the plugs.

 

[maddydogg]

Update: Re: Possible fouling?

Update: Re: Possible fouling?

Got home today pulled the plugs, they were all caked up and wet. They wiped up to near new condition, put them back in and she fired up on the first pulled. It took 15 seconds or so for water to spurt from the tell tale. How much water is supposed to come through the tell tale and should it be under much pressure? the volume varied depending on the amount of throttle, with peak volume directly after the throttle was pulled back. tia. john

 

[Plainsman]

Re: Possible fouling?

A good steady stream that increases with throttle.

 

[j_martin]

Re: Possible fouling?

Caked up plugs indicate way too much fuel. Likely the needle valve isn't working right. could be gummed up, or the float could be bad.

Check the choke. Make sure it's open for running.

It's probably time for a carb kit.

John