Starting Running Issue Need Sugestions

billblanken1

Cadet
Joined
Jun 10, 2013
Messages
7
I have a 1994 Mercury Mariner 115hp 2 stroke. The issue is starting but runs rough and need to keep choking to keep motor running or it stalls in drive with water muffs on. List of work I did within in 6 months. I only put non ethanol fuel in.
1)Lower unit redone 2) new stator 3) new trigger 4)replaced coil and wires 5) new plugs and wires 6)new starter 7) new battery and negative and positive run cable runs 8) new fuel separator 9) new prime bulb and hose 10)timing adjusted 11)new voltage regulator 12)new fuel filter
Ran rough after all with the wok so I thought missed something. Took to a large professional marine repair shop. Mechanics looks over and made adjustments but said all was good but running like a scaled dog and need to redo carburetors and would cost $600 additional to do. I took home to do carbs have done many of times for outboards and cars. Took carbs apart used carb cleaner rinsed and cleaned. Meticulously put back together with certified carb rebuild kit. Put back on and no go same. Starts rough and still runs like a scaled dog. I runs with a shake and need to choke to keep running.
What am I missing? I think it is a fuel issues somewhere. I will admit I did not change fuel lines from tank to engine or fuel pump.
Ideas?
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,983
Post the results of a compression test.--It is the first thing to do when trouble shooting a motor.
 

enginepower

Petty Officer 1st Class
Joined
Jul 5, 2014
Messages
260
Post the results of a compression test.--It is the first thing to do when trouble shooting a motor.

What ^ said...that will let you know the condition of inside of motor and if you have to choke it to run at idle, you have a worn engine, an air leak or carbs need cleaning or adjusting.
 
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