Re: Air bubble after replacing oil inject lines - '89 100HP
Thanks for the replys RodC & Scali.<br /><br />I tried but wasn't successful in forcing the air bubble out with my fingers. Since there was almost no working room on my motor around the actual tank nipple, I removed the tiewrap securing the "T" end of the line from "T" to oil pump. With a bunch of disposable shop towels folded and placed them under that area I eased that line off the "T" nipple such that the bottom of the line was still on the nipple, but the top of the line was off just slightly allowing air to escape as the oil from both the tank and sight tube filled the void. After seeing no more air bubbles and only oil was escaping I let the oil drip for another 2-3 seconds and then slipped the tube back fully onto the nipple. I then went over to the oil pump and loosened the bleed screw to let some more oil out at that end of the line. After 15-20 seconds of full oil flow from the oil pump I closed the bleed screw and thankfully the lines appear to be completely full with no bubbles.<br /><br />I'm gonna print this note and staple it in my Merc manual to remind myself next time to do the following two things:<br /><br />(1) Don't install the tiewrap/clamp at the "T" nipple of the "T" to oil pump line until after adding oil, to allow bleeding at that point. <br /><br />(2) When initially re-adding oil to the tank, if the oil is added slowly, I believe the lines can possibly bleed themselves if the oil is added slow enough so as to not fill the full diameter of the lines. This could allow air to escape as the lines are filling instead of being trapped by a full tube of oil. An idea for this could be to siphon oil from the gallon oil container into the tank using a hose with a smaller inside diameter than the 1/4" ID ones used for the other lines (on my motor). I don't know if this will work or not, but I'm saving the note anyway and I might give this a try next time. <br /><br />Many thanks guys for your help,<br /> Marty
