need to replace thermostat on a 1986 15 hp johnson. i have removed the bolts from the cover, but it will not come off due to the hood latch bolt. do i need to remove the powerhead to get this cover off?
motor runs fine choked, but when i open choke, motor slowly dies like a lack of fuel. also fuel tank has no venting from what i can see. after running motor for a few minuites then shutting down and open tank it makes a hissing sound