Motor is a 2008 25hp Yamaha 2-stroke.
Never had much mess with this motor. Has only been on the water twice this year, last time being about 2 weeks ago. Boat ran perfectly with no issues. Yesterday the wife starts complaining about fuel smell in the garage so pull all fuel cells and jerry cans and everything looks legit. Make my way around behind the boat to find a basketball-size stain on the cement under the motor. There was a good amount of buildup on the top of the cav plate and it looks like the source is a few small holes on either side directly above the plate. Leaking almost identically on either side. I cleaned it all up, put down some litter on the ground, checked it a couple hours later and found it’s still actively leaking.
I know unburned fuel can come out the lower unit, but this seems like more than normal. Especially cropping up 2 weeks after the last use. Any ideas? We leave for a Canadian trip in 2 weeks so I’ve gotta get this sorted out ASAP. Many thanks!
(I’ll post pics from Before cleanup in this post, and from 2 hrs post-cleanup in the next post.)