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Update: Mercruiser A-1 gear lube consumption
Finally!. I got my service appointment today. In by 9AM,
and they called me at work at 2PM and said come get it. I droped it off with a laundry list - main issue being how it started using 2 oz/hour of gear lube after 1 year. Here is what I got back: 1) Found no oil leak, stern drive passed pressure test. Customer needs to understand that oil in lube res. will drop as air pockets in drive surface. (Removed steern drive, replaced gaskets, bellows Ok, dry, clean, good shape. 2) slight vibration at 1,900 RPM is normal, this is a "transition point" for this engine, and also depends on position of stern drive etc. 3) valve ticking: this is normal for this engine. 4) slight play in steering: This is normal for a one-cable steering system. 5) Performed stern drive maintenance, checked engine alignment, lubed bearings, u-joints, checked/lubed shifting cables and other associated parts for annual maint. 6) replaced cup holder in engine cover. 7) broken block drain hose pull up bracket ordered. Price included in this invoice. 8) Changed oil. Total: parts/2.0 hr labor, oil, shop aupplies etc: $250 Total with Tax: $270 So there you have it. No one in the shop can explain why a 1-year old boat would finally decide to burb up an air pocket/bubble after so much time, but thats the deal. The air pocket was believed to be in the drive, not the hose leading up to the resivor. Took the boat right out to the lake this afternoon after picking it up, and had a nice birthday outting. Boat ran fine, even seemed to run a little better that normal. Coupla beers, few smokes, tearing it up, fast, slow, trolling, hole-shots, you name it. boat seems 100%, just no arguing that, period. Hope this info, and my experience helps others. Noteworthy point being that it is possible that a trapped airpocket in the stern drive can break loose after 1+ years. Size of bubble was 6 oz. coolness. (still decideing whether to keep it or sell it), but not so consumed with that whole thought so much now. "Jim" wrote in message ink.net... no "Mr Wizzard" wrote in message . .. "Jim" wrote in message ink.net... Don't get hung up on the shift shaft seal. Nothing should have failed at the 1 year mark, so I couldn't even speculate as to what your problem is. Cool, Ok... Just have to wait for 2 weeks till I get in to the shop. Nother quick question - would excessive water pressure from a set of ear muffs do it ? I usually only open the faucet 1/2 way, but I do have pretty high water pressure. "Mr Wizzard" wrote in message . .. "Jim" wrote in message ink.net... The bushing assembly( used to be metal) has a groove the oring fits into. It would be pretty difficult to unseat this oring. The oring seals the bushing assembly to the gear housing. in the middle of the bushing are pressed 1 or 2 seals (I forget). The shift shaft is sealed by these seals. the shift shaft rotates about 45 degrees. The shift shaft is in front of the water pump and in back of the cavity I spoke of. There is only 1 drain hole for the cavity. There is no pressure relief issue since the gear lube is able to expand and contract and fill and empty the reservoir just like the expansion tank for your car cooling system. Cool - yeah, I was reading about the shaft positions - 10:00 Rev, 11:00 neutral, and 12:00 forward. Ok, cool, so the bushing itself has little seals preseed in seals. Geeze, with only an occassional 45 degrees movement, don't see why it would be so common for the shift shaft seals to leak. Maybe thats just it - the shaft never moves 360 degrees, so maybe it never gets proper wiping and seating on seal lip or somehting? who knows. Also, on mine, (2005 Alpha-1 Gen II), there really are 2 drain holes, one on each side of the lower unit towards the rear. And so yeah, I agree about the venting (up into the gear lube monitor) so I don't know why the Olympic boat center service department dude told me on the phone that the shift shaft seal also acts as a pressure relief. Also read where some people say there is a check valve in line with the tank and the drive, and other say no. But there really -can't- be a check valve since the refill procedure says to pump the gear lube "up" from the lower unit until it fills the gear lube monitor - somehting you wouldn't be able to do if there were a chack valve in line. Anyways... So what is your experience with the newer Alpha-1's (gen 2) drives ? How likely is it that my shift shaft seal is what is leaking? How involved is dropping the lower unit to have a peek? Or should I say, how involved is re-assembling it correctly? I assume that you can do this with the outdrive on the boat? Probably just wait for y service appointment in 2 weeks, but just curious (roll-away chock full of tools on a cloudly Saturday, and its killing me that I can't dive in). Course, no "special" Mercruiser tools in the tool boxes anyhow. Got all the Ford 4x4 differential tools, - do they count? (Ok, joking) "Mr Wizzard" wrote in message ... Yup - also think I'm getting the picture here too... Correct me if my thinking is off here. Shift-shaft is on the starboard side, and water pump on port. Since port side is bone dry, and s.b. side a tad wet, I suspect shift-shaft bushing seal. Also, (finally) understand the shift shaft bushing thing now. So I been seeing pics of the ss "bushing", and tools to screw in/out the bushing, but failed to under- stand how a hard plastic collar bushing could be a seal. Finally found a web page that explains it. Its a hard plastic threaded bushing with slots on the top (to screw it in/out), BUT, its got n O-ring down inside of it. Somewhat common for the O- ring to pop out, or walk itself out of hte center of the bushing, and just float around the shaft on the top of the bushing. So..... Got an appointment for Aug 16th (2-weeks from now), so we'll go from there. Question is, is it bad enough to have to stop using it for the next 2 weeks - thats what I have to evaluate now. Fear being getting water in the drive. Also, had another dealer tell me on the phone that the shift-shaft seal also acts as a pressure relief valve. (?) Don't understand that as all! - if so, pressure would pop the O-ring out of the hard plastic shift-shaft bushing, but that action would be permanent, right? How could an O-ring act as pressure relief and remain in tact? (guess I'd just have to see it all apart on the bench) Jim |
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