Re: automatic oil injection confused ?'s
I don't know much about any engines other than my own, and even that is limited, but I just went through the same thing with my 97 Merc 175. <br /><br />About 45 minutes ago, I spoke to a wrench at Emerald Coast Marine in Pensacola who confirmed what I said in an earlier post.<br /><br />It's pasted below...<br /><br /><br />~~~begin quote~~~<br /><br />Okay, I decided to lose the oil injection system and premix. One thing I noticed immediately was the difference in power while accelerating to WOT - especially on the engine that had lots of oil (or fuel and a lot of oil) draining from the carbs after shut down. <br /><br />I can only think that this is because the oil pump was way out of adjustment. Regardless of what caused it, I like the way it runs now. Much, much better.<br /><br />Another issue is that when I removed the driven gear on that same engine, a large clump of metal shavings came out with it. It actually looked like a small Brillo pad.<br /><br />They sure run better now though.<br /><br />The only thing is that I kind of feel the same way I did on the day I had my dog neutered.<br /><br /><br />As for needing a plug...<br /><br />A description of the components follows.<br /><br />On my 97 Mercs - 175hp - starting from the crank case and working outward toward the oil pump.<br /><br />First, the driven gear is inserted into the crank case.<br /><br />Next, there is a coupler that goes into the crank case and rests against a little ledge or lip preventing it from falling/sliding into the engine. The end of this coupler that is facing the engine has a half-moon slot in it into which the drive gear slides.<br /><br />The bushing rests against the coupler with the worm gear inserted into the coupler.<br /><br />If the driven gear is removed, the coupler which is seated against that lip can not physically go any further into the engine than it would if the driven gear was installed. Aside from not driving the pump, there will literally be no effect on the worm gear, bushing, or pump.<br /><br />If the oil lines are capped, and the pump is not driven by the driven gear, it's basically a plug and cover. <br /><br />I can't offer a single word about another engine (because I don't have a clue), but this is the way my two 97 Merc 175s are set up.<br /><br />~~~end quote~~~<br /><br />The main thing is to plug the hole and remove any parts that can get into the crankcase.<br /><br />Also, don't forget to disconnect and plug/cap your oil input/output hoses/ports<br /><br />Hope this helps, Michael
