Yamaha 150 Four Stroke unstable tickover
I'm hoping someone can maybe point me in the right direction. My Yamaha 150 four stroke(2007) has been running perfectly until yesterday, at tickover it's started hunting between 500-800rpm, I've changed the water separator filter but didn't have a fuel filter element for the filter on the front of the engine under the cowling.
Just in case the primer bulb was the issue I've also removed this using a 3/8th connector.
When running the engine in gear I'm getting 5100rpm, I normally get about 5300-5400rpm depending on conditions.
Any ideas anyone??