Time to change the oil in the lower unit of my Evinrude 30 horsepower outboard motor. The last time the oil was changed was probably 6 or 7 years ago when the water pump was changed and a new powerhead was installed.
While my wife and I were in Jasper, Texas taking care of some business, we stopped by the Evinrude dealership and got some gear oil. The guy behind the counter handed me a package with a bottle of oil and a pump. The oil was Mercury brand name, SAE 90. I asked the guy if it was ok to use on Evinrude and he said yes. The shop is an authorized Evinrude dealership, so I took his word for it.
The drain the oil of the Evinrude lower unit there are two flathead bolts. An oil drain pan was grabbed from the shed and placed under the lower unit. The bolts were in so tight, I had to put a pipe wrench on the screw driver to break the bolts loose. Top bolt was removed first, then the bottom bolt.
Good news, the old oil did not have any signs of water or metal shavings in it. Nor were their any metal shavings on the drain plug.