1997 Mercury 125 2X2 - Rejetting / Recarb ?

[Tomoka]

So I was running down the river last week and the motor stopped on me. I coasted and attempted to restart. The engine has seized. Now I get to rebuild, which I am looking forward to. I have a question

2X2 Design - From what I hear this was only used on a few models. Technology relies on 2 carbs not having idle jets and thus not active until enough pressure is exerted on the fuel system to push fuel past the drive jets.
I have heard great things about the Merc 125s and have had many other Mercs with no issues.


Has anyone heard of rejetting the carbs so that all of the cylinders fire during all speeds. I use my boat a few times a month and the fuel consumption is not my concern. I want an engine that idles smoothly and does not lean out for fuel savings.

Can I rejet or has anyone heard of using a carb from another 125 of the same era without the 2x2?

Thanks for your advice.

 

[EMC 1810SS]

Re: 1997 Mercury 125 2X2 - Rejetting / Recarb ?

The bottom two carbs are different castings. They do not have and IDLE circuit or low speed needle. I have heard of many people getting two extra carbs with the idle circuit from the top two cylinders of another motor but I have not done it myself. When adjusted properly the bottom tow carbs kick in so quickly its not an issue that justifies the expense for most people. And if you have a long no wake like I do, You use less than HALF the fuel at idle.