Changing the lower unit oil on my Mercruiser and I know the procedure for taking the vent plug/drain plug out to create a vacuum so that the oil doesn't gush out the drain plug when you're done. I am not getting that vacuum though. My unit says it takes 32 oz of lube and I pumped a full 32 oz container into the unit...I expected to see the oil coming out the vent plug at the top but it didn't. I replaced vent plug anyway and went to replace the drain plug, but when I removed the pump nozzle from the drain hole, the oil started running out quickly. I got it sealed with only a couple of ounces leaking out, but does this indicate a bigger problem?
Right before doing this, I had the lower unit off to change the impeller and then had a minor issue that required me to remove the sterndrive unit as well...could the lack of vacuum just be due to air being trapped in there? The gasket seal between the two units looked to be in good shape so I don't think that could be the break in the seal, but I'm not absolutely sure.
Thanks...go easy on this newbie.
Right before doing this, I had the lower unit off to change the impeller and then had a minor issue that required me to remove the sterndrive unit as well...could the lack of vacuum just be due to air being trapped in there? The gasket seal between the two units looked to be in good shape so I don't think that could be the break in the seal, but I'm not absolutely sure.
Thanks...go easy on this newbie.
