2008 evinrude etec 150 118hrs. Taken care of.
Before I launch I always pump the bulb till its firm regardless that it's fuel injected. Well last trip I didn't and... It ran good for a couple hours and then I pulled into a cove and raised the motor ALL the way out of the motor due to stumps. Fished the cove for about 1.5 hours, dropped the motor down and fired right up and jumped on plans like normal. Well when it leveled out on plane I was at 3500-3650 RPMS when I went to give it some more throttle the rpms slowly dropped and I panicked and came to a quick stop and shut her down. Tried to re start, wasn't happening. Checked battery connection and checked bulb, bulb was completely empty, squeezed it and then it got firm. Took a couple cranks but motor started up and ran great again all day. What could have caused this?