the-outdoorsman
New member
It is a 1990 model # E20CRESB. I did a compression check and top cylinder is 118 and bottom is 120. I bought this motor about 4 years ago. Ever since I have had it, when I run it around a 1/4 throttle it will sputter every 10 seconds. Once it is good and warmed up it is a lot harder to get it to sputter. It never dies though. If I open it up, it runs great. If I start from idle and open it all the way, it takes off and runs great without any sputter. It won't idle either' it dies or runs really rough. If I advance the throttle just a little it will idle then. The cam roller hits the two little notches just as the carb plate starts to open. I think this is correct according to my service manual. I have the low idle mixture screw set at 1 3/4 turns out as suggested in the manual. I have turned that in and out to see if I can make it run smoother and I think it is close at 1 3/4 turns as it runs best there but still will not idle. I rebuilt the card to try and fix the issue but had no effect. Anyone have an idea as to what else I can try. It runs really well at the top end. Also, I pulled the plugs which are new and they are a nice chocolate brown. Here is a video of it sputtering when the motor is not warmed up good.
https://www.youtube.com/watch?v=lPY2erdLtmk&feature=youtu.be
https://www.youtube.com/watch?v=lPY2erdLtmk&feature=youtu.be