How to Adjust the Idle on Yamaha 9.9hp?
How do I alter the idle speed on my 9.9 hp Yamaha outboard motor? If feels like it idles too slowly when it is out of gear. Sometimes it stalls when I switch it into gear. So I wanted to increase the idle speed so the engine will increase RPM and not sputter out. And where is the idle speed screw located anyway?
I should also mention that the idle is a little rough. Even when I put it into gear but don’t put a load on it, the engine runs uneven and a little bumpy. I have not tried to go fast since it started acting up because I don’t want to break anything.
Any how-to advice or tips to get it running right? My Yamaha boat motor is a 2003 with model number 9.9MSHB. I would bring it to a mechanic but I’m a kid.