2.5 inline4 tuning

[kkline06]

Have questions. I have a 69 2.5 that needs tuned. I have set to specs and seems to idle low ( 350-400) Any tips on points/timing and also on points I think I read a thread on here that I dont set dwell on this. Is that right? Any help would be great.

 

[180shabah]

Re: 2.5 inline4 tuning

Go up to the adults only sticky, there is a merc manul there for your engine. it should answer all your questions.

 

[JustJason]

Re: 2.5 inline4 tuning

I'm kinda surprised your that low. Especially if the boats in the water. Are you using the boats tach or a shop tach?
You need a dwell meter to set points on pretty much everything with points. They can be had at sears for 30 bucks

 

[kkline06]

Re: 2.5 inline4 tuning

I am using a shop tach and that is with muffs not in the water. I was having a bad backfire through the carb. I think I got that problem fixed(timing was way off) but now I need to fine tune. It just wants to idle really low.???

 

[JustJason]

Re: 2.5 inline4 tuning

you have an idle speed screw on the side of the carb ya know.... Download manual 1 out of the "Adults only" section. all the info you can ever need is in there. The file is huge, over a gig. Make sure you right click and save as.