My 9.8 Merc. has a small vent screw that someone has broken off leaving half still in the<br />housing. The head still has 1/8' of thread so it can be still be screwed in and tightened.<br />No amount of pumping will allow lube to enter the 'fill' hole. So, I turned the engine upside<br />down and poured the the warmed up 90W oil in 'till it 'topped up'. About 150ML. <br /><br />Now my question: Should I now release a small amount to allow for expansion after I turn <br />this thing right side up? How much oil does it take under normal servicing?<br />By the way, now that you're here, what's the spark plug gap for this engine.<br /><br />Thanks for listening,<br />Bud<br /><br />PS: I'm not going to risk an attempt to remove the broken screw.
