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I need some help with an 84 Evinrude

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Old 03-05-2018, 10:49 PM
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Default I need some help with an 84 Evinrude

My daughter bought this with a boat and it would only run on one cylinder. So I got a pair of carburetor kits and installed them and I believe I did it right but I'm not sure. After that it's still only wants to run on one cylinder and not very well and now I'm getting a lot of black soot in the water that's running off from the water pump. What is my problem or what did I do wrong?
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Old 03-06-2018, 12:58 PM
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Start by checking the cylinder compression then check for spark on all cylinders.
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Old 03-06-2018, 01:00 PM
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Originally Posted by mitchell master View Post
Start by checking the cylinder compression then check for spark on all cylinders.
Ok,will do. Thanks
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Old 03-08-2018, 09:44 PM
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Default Re: check compression and Spark.

I didn't check both spark plugs and I'm getting spark to both of them and I did open the drain cap on the bottom carburetor and I have fuel coming from the bowl so I know I'm getting fuel to that carburetor. A friend is going to bring over a compression tester so we can figure out where we are with that. That's the latest update.
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Old 03-09-2018, 07:23 AM
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What did the plugs look like ? One wet,one dry,one black,one clean etc ? Reading a plug's condition can tell a lot.
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Old 03-09-2018, 08:41 AM
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Originally Posted by mitchell master View Post
What did the plugs look like ? One wet,one dry,one black,one clean etc ? Reading a plug's condition can tell a lot.
Yes one plug was wet and black the other plug was clean and dry. A friend is bringing a compression tester over tonight so we'll know where that is. And thanks for your response back.
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Old 03-10-2018, 10:00 AM
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Originally Posted by Brownridge2005 View Post
Yes one plug was wet and black the other plug was clean and dry. A friend is bringing a compression tester over tonight so we'll know where that is. And thanks for your response back.
the compression test shows 146 on one cylinder and 145 on the other cylinder. Both carburetors are in a can of carburetor cleaner and will be left overnight at least 24 hours. I tore the fuel pump apart and found somebody had replaced the filter with window screen wire. Unfortunately nobody's open on the weekend for parts for an Evinrude so we'll wait till Monday to get the parts for it and then slam it all back together and see what happens. Any other suggestions that you might have?
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Old 03-10-2018, 10:58 AM
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Excellent compression. When you pull the carbs from the sauce put the garden hose and nozzle to them.Watch all the little orifices in the throats for misting then blow them out with air.If you don't have air,use a can of spray cleaner.Also inspect the inside of all the hoses.
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Old 03-10-2018, 11:13 AM
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Originally Posted by mitchell master View Post
Excellent compression. When you pull the carbs from the sauce put the garden hose and nozzle to them.Watch all the little orifices in the throats for misting then blow them out with air.If you don't have air,use a can of spray cleaner.Also inspect the inside of all the hoses.
Okay will do. I should be ready to try and start it Monday after I rebuild the fuel pump.I'll let you know how it goes. Thank you
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Old 03-13-2018, 08:31 PM
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Originally Posted by Brownridge2005 View Post
Okay will do. I should be ready to try and start it Monday after I rebuild the fuel pump.I'll let you know how it goes. Thank you
Well I got the fuel pump kit and got it installed and put on the motor and it fired off like a sewing machine. My daughter is just beside herself and I really thank you guys for all the help it was great dealing with you professionals and as a novice at this I appreciate all the help you gave me. Thank you.
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Old 03-18-2018, 07:13 AM
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Unless you have non alcohol gas available, assume none of your fuel lines are alcohol resistant, and if you have to use this garbage alcohol gas, begin to replace them.
The alcohol breaks down the lines and they clog carbs and may create a lean burn which destroys your engine. Or just clogs the passages and you paddle.
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Old 03-18-2018, 07:18 AM
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Originally Posted by wezie View Post
Unless you have non alcohol gas available, assume none of your fuel lines are alcohol resistant, and if you have to use this garbage alcohol gas, begin to replace them.
The alcohol breaks down the lines and they clog carbs and may create a lean burn which destroys your engine. Or just clogs the passages and you paddle.
that's very good advice and that's exactly what I did. All the fuel lines from the fuel pump to the carburetors was changed and screw down clamps were applied to stop the gas leak. Thanks for the reply.
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Old 03-19-2018, 09:57 AM
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Hello, I second replacing the fuel lines with alcohol compatible types, can´t hurt either way, do you know when the motor was last run? Might be worth running some cleaner through it, seafoam or Mercury Powertune are both good, replace any old gas in the tank too, old fibreglass tanks can be broken down by ethanol gas too, also always use quality 2 stroke oil, Johnson Evinrude made their own, I have always used Mercury 2 stroke oil, some smoke less than others. Hope this helps.
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Old 03-19-2018, 10:33 AM
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Originally Posted by buxa View Post
Hello, I second replacing the fuel lines with alcohol compatible types, can´t hurt either way, do you know when the motor was last run? Might be worth running some cleaner through it, seafoam or Mercury Powertune are both good, replace any old gas in the tank too, old fibreglass tanks can be broken down by ethanol gas too, also always use quality 2 stroke oil, Johnson Evinrude made their own, I have always used Mercury 2 stroke oil, some smoke less than others. Hope this helps.
All good advice. Thanks.
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