
Originally Posted by
kyriver
change plugs, change lower unit oil.
I would use fresh gas, but I have no idea how to get rid of your old gas.
Be absolutely sure your impeller and water pump are in good shape! Don't take the boat and check for stream,..have someone verify they are in good shape.
See if there's any way to "hand lube" the cylinder walls/rings. Over time, oil drains. Your top cylinder could get hot and get damaged on first start up.
If you have an oil pump, I would also "pre mix" until you can verify the oil pump is working. You'll be running a little rich, but that's fine. You can change plugs later.
Bottom line, you must be sure that your cylinders/pistons/rings are lubed AND your water pump/impeller is functioning. If not, you'll be looking at a $2000 rebuild. I recently bought a gently used boat, but it sat without being used.
After running in driveway or on ramp, Check compression. If all cylinders aren't close (within 20 lbs?) stop and find your issue!