I need to turn it up again. The dealer did it about 3 years ago. does anyone know where the adjustment is. It starts fine just kills when I put it in gear. Put a can of seafoam in and ran a 1/4 tank and no change so far. Please help.
I have a 2005 125 and it was simply an adjustment on the motor that I could turn with my hand. I just had my dad put the boat in gear and adjusted it until it ran smoothly. If you are sitting in the boat it was on the right hand side and had a spring on it. Hope this helps.
What is it idling at before you put it in gear? If it is in a decent RPM range (750-950) at idle and dies when put into gear it sounds more like the idle screws on the carbs need adjusting. Only the top 2 carbs have this (hence the 2+2) adjustment. I pull all 4 of my carbs off about every other year and clean them. The idle screws on the carbs themselves adjust the mixture, too lean and it will die when put into gear, too rich and will cough and stumble and foul plugs on the low end.
Birdsnest,I also have a 2+2 motor(1996 Mariner 115).I found out 2+2 means the motor runs on 2 cylinders from idle to around 1600 rpm. If you have a little mechanical skill and would like to try your hand at it go to http://www.themarinedoctor.com .This site is pretty informative,I got mine running pretty good by replacing fuel hoses and primer bulb, they were probably the originals.Another one is http://www.iboats.com a good site too.
Good luck,
Stan
Note:
If the motor doesn’t run the same, then it is time for some cleaning of the fuel passage way, or your electrical end of things are weak (plugs/wires/etc).
Also, “syncing” carbs is not for the novice. Carbs need to be balanced. My assumption is that you don’t have the equipment to do this right. For a couple of hundred bucks at the right shop, they’ll get you tuned up where you need to be.
Here is a link!
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