need some advice

[savage4648]

i have a 2005 yamaha 4stroke 90hp owned since new always keeped maint. up well sat for a while got bad gass in it added octane boost to it well stopped running so changed fuel and filters an now its getting gas in the oil bad injectors or fuel regulator any advice would be great

[boats.net]

Need to check fuel pump to see if leaking gas into crankcase, May need to remove and clean VST tank and injectors.