I’ve just replaced the head and gasket after the head gasket blew and at the same time fitted a new carb. On firing the engine up for the first time I noticed that fuel was squirting out of the drip tray nozzle. I tried adjusting the mixture with no effect. After some web research it seemed possible that the float or valve may have been stuck but that seemed unlikely as the carb is new. I removed the cover to check the float to find its plastic and not brass. I then read on a website that the float to gasket gap should be 8.5mm if plastic rather than 6.5 for brass. It was actually set to 6.5, so adjusted it accordingly to 8.5 and refitted it and hey presto it no longer floods, but there’s a flat spot when I open the throttle.
I have 2 questions if someone could help me with.
1. Is it correct that the float gap should be 8.5 for the newer plastic floats. I wonder if it it’s maybe a little too big so there’s a slight starvation of fuel hence the flat/sluggish spot when opening the throttle.
2. Can someone tell me definitively whether screwing in the mixture screw is making it richer or weaker. I’ve seen both on the web but most descriptions just talk about the process of setting the mixture without saying which direction makes it richer. I’ve literally spent hours searching!
Many thanks for any information
Alan
I have 2 questions if someone could help me with.
1. Is it correct that the float gap should be 8.5 for the newer plastic floats. I wonder if it it’s maybe a little too big so there’s a slight starvation of fuel hence the flat/sluggish spot when opening the throttle.
2. Can someone tell me definitively whether screwing in the mixture screw is making it richer or weaker. I’ve seen both on the web but most descriptions just talk about the process of setting the mixture without saying which direction makes it richer. I’ve literally spent hours searching!
Many thanks for any information
Alan