200 spitting gas

[danhaiz]

1995 evinrude oceanpro 200 spitting gas (Backfiring, coughing gas) in one cylinder. Changed reed valves, all gaskets, got spark, changed power pack, plugs wires, rebuilt carbs, adjusted needle, did it all I think? Gas seems to build up in cylinder and it coughs. You can see a build-up of gas at the bottom of the barrel on the car. No others do this. Changed carbs and does the same only on that cylinder, Had a marine motor mechanic take apart and look and put it back together with new gaskets and does the same. Thanks for replies in advance.

 

[fishhunter]

Re: 200 spitting gas

sounds like u have done everything , how bout compression test, maybe it's not sucking the fule into the cylinder , iam not a tech all i know is watt i read in the paper (will rogers)

 

[danhaiz]

Re: 200 spitting gas

compression is great!

 

[Dhadley]

Re: 200 spitting gas

Which cylinder is doing it? Keep in mind this is an "X" front half. The carb for number 1 (top starboard cylinder) is mounted on the top port of the intake manifold (still the highest carb).<br /><br />When you say you switched carb, did you switch the assembly including throttle body or just the plastic carb body?<br /><br />Good luck!

 

[danhaiz]

Re: 200 spitting gas

If i am looking at the carbs it is the bottom right. I only switched plastic carbs. The top 4 bodies are together and the bottom 2 are together so no way to switch bodies. Are you suggesting I might switch bodies? Would be easy to do if I can find one at a junk yard.<br /><br />Thanks a lot

 

[Pirate T]

Re: 200 spitting gas

Did you check to see if your primer solenoid line goes to that carb? If the solenid is stuck open it might be the cause of the problem. You can test it buy starting engine and running engine in neutral above idle but not too high and push the key in as if you are trying to apply choke while the engine is running. The rpm's should drop noticably when you push the key in. If the rpm's stay the same, then your primer/choke could be stuck open. Also check to see if the manuel primer switch button on the engine is in the correct postion. If it were stuck open it would be running rich/smokey too. I've seen this happen.<br /><br />Good luck

 

[danhaiz]

Re: 200 spitting gas

Thanks for that suggestion. That's a good one. Do you know if the choke only feeds to one carb or would excess gas be evident in all carbs if it were stuck open? I am only seeing the excess gas in the bottom right carb building up at the bottom of the intake near the brass jet. It is a contant feed of the same amount of gas. When I accelerate I do not have a gass spitting problem. Only at idle.I will be able to cjheck the choke when I get to the boat next week.

 

[Pirate T]

Re: 200 spitting gas

I'm not sure which carb or carbs your primer line feeds, but it's easy enough to figure it out. Locate you primer solenoid on the engine and follow the line or lines. The primer is about the size of a D cell battery. There should be a main feed to the primer that tees off the main fuel line and a smaller line or lines that come out of the primer to carb(s) when the key is pushed in or the manuel button on the primer is in the open postion. There's two wires to the primer (Black-Ground)and (Purple to key switch) if my memory is correct. It's an easy enough test. Rev it up in neutral enough to tell if it chokes out when you push the key in. If it doesn't choke out, then it might already be choked. Also make sure the manuel button on the primer is closed. Is that cylider's plug wet? Your problem is fuel or fire. If the spark test was done properly, Not one at a time, but done with a six wire spark tester to make sure you don't have innermitten spark, then it's got to be fuel. If it had innermitten spark in that cylinder, then I would start with that cylinder's ignition coil and work my up. I went through the same thing in Marine Mechanic school; Stator, Power pack,etc. and it was the Primer.<br /><br />If the key switch malfunctions, it could also hold the Primer solenoid open.<br /><br />Let me know?

 

[Pirate T]

Re: 200 spitting gas

I read up on it and the primer feeds an equal amount of fuel to each clyinder. I would still test the primer. <br /><br />You might try a new spark plug just in case. <br /><br />I would say "check the float level or needle in that carb", but you said you changed carbs.<br /><br />If nothing else works, troubleshoot the recirculation/puddled fuel (bleed system). You might need a manuel for that. It's a good idea too get one if you havn't already.

 

[Dhadley]

Re: 200 spitting gas

Yes, I would switch the two bottom throttle bodies and see if the problem followed the throttle body. You can leave the carb bodies on the throttle bodies. <br /><br />Also look to see if the pulse limiter and hose that operates the fuel/oil pump is connected with that cylinder. <br /><br />Good luck!

 

[danhaiz]

Re: 200 spitting gas

Pirate T. Thanks for the info. I will work on it. The boat is in Hollywood, FL and I am in PA. I will be heading there to pull it from storage on Fri. May 9th. If you could send me an e-mail I can e-mail you back on how it's going. My e-mail is arrow@stargate.net Thanks again, DanHaiz