Hard Miss at idle, mercury 25xd

[bassone]

I have a 1985 Mercury 25xd, while running at idle and idle only it will all of a sudden miss real hard, it's hard to explain, it's like it coughs and starts to idle fine again but in about 10 to 15 seconds it will do it again. It jerks the motor real bad when it does this. Once you give it gas it runs great. The starter is bad so i have to pull start it and it starts on the first pull almost every time. Please help!!!!!

 

[jbjennings]

Re: Hard Miss at idle, mercury 25xd

What you're describing is called a lean sneeze. Either your low speed fuel circuit is clogged up and you need to rebuild the carb to get it clean, or the low speed mixture screw is misadjusted.
JBJ

 

[Faztbullet]

Re: Hard Miss at idle, mercury 25xd

Hey JB!!!
Bassone try opening idle screw 1/2 turn as JB suggested,if it dont help clean and rebuild carb..

 

[bassone]

Re: Hard Miss at idle, mercury 25xd

Thanks to the both of you! I will try this when i get home today, Once again thanks. JBJ nice last name, same here, lol!

 

[bassone]

Re: Hard Miss at idle, mercury 25xd

It Worked!!! Thanks again!!!!!

 

[jbjennings]

Re: Hard Miss at idle, mercury 25xd

Howdy Faztbullet and cousin Jennings!
Glad to hear you got it smoothed out. I also have an '84 25xd. I'm looking for a machinist to recut my gear ears and clutch dog, and it will be like new.
Later,
JBJ

 

[Faztbullet]

Re: Hard Miss at idle, mercury 25xd

If you cant find anyone to do it, ship em to me as my guy is great on this!!!