Home › Forum › Ask A Member › 18HP saga continues. Can’t get past 14mph and 3,900 RPM. › Re: 18HP saga continues. Can’t get past 14mph and 3,900 RPM.
I went ahead and ordered that bowl/needle kit off ebay. I’m going to put another carb together to test. I have a lean miss around 1,600RPM I’d like to get rid of. I think it’s when the carb is switching from the low speed circuit to the high speed circuit. I can fatten up the low speed mixture a bunch and almost get rid of it, but it makes the carb load up at idle. It could be something with the powerhead, because my last powerhead didn’t have that dead spot. Could be an air leak or something. I’m definitely happy with the motor as is, just want to try to perfect it. I watched a bunch of 18hp videos on youtube and I saw a few motors that seemed to have the same sort of stumble. You can drop down 200 RPM, or go up 200RPM and it will run perfect.