Shift noise after changing winterization technique

[andrewgroup]

1969 Mercrusier Type II..<br />This winter I drained the gear lube from the outdrive in the fall. Filled it with Amsoil 80-90 Marine Gearlube 5 Quarts, prior to waking it up from the winters sleep. Shifting into forward or reverse seems extremely metalish. Was fine in the fall. I thougth the amsoil marine gear lube seemed thinner that the old green quicksilver stuff, but can't believe this made for noise. I'm thinking the shift interupter mechanics are wrong since he small switch does kill the engine when depressed.<br /><br />Does anyone remember or still have any experience on the Older 1:78 type two outdrive? If so, what are your thoughts on the best gear lube for this drive?<br /><br />andy

 

[hondon]

Re: Shift noise after changing winterization technique

5 quarts? ARE YOU SERIOUS? 5 quarts?If you squeezed 5 quarts of gear oil into this unit something is going somewhere it is not supposed to go ,like into the u joint bellow ,past the u joint seal.Capacity for this gearcase is a little more than a quart and a half.

 

[achris]

Re: Shift noise after changing winterization technique

Sorry Hondon. The capacity of the MC-II is 5 3/4 Quarts. The MC-I was a quart.<br /><br />Chris.........

 

[kcole683]

Re: Shift noise after changing winterization technique

Andrew T. said: "This winter I drained the gear lube from the outdrive in the fall. Filled it with Amsoil 80-90 Marine Gearlube 5 Quarts, prior to waking it up from the winters sleep."<br /><br /><br />Did you drain the oil and leave it emty all winter?? Sounds like it from your post,if so that is a good way to get your drive internals a little rusty. I would think anyway.<br /><br />If the viscosity is lower on the synth.oil that could make a little difference.<br />Good Luck

 

[andrewgroup]

Re: Shift noise after changing winterization technique

ACHRIS60, It sure is funny when you tell someone it takes 5+ quarts, and I don't have a water pump. No, it's just transmission full of gear lube hanging off the back of my boat. I did leave it empty this winter, assuming the remaining gear lube would provide the necessary coating. I borrowed my buddies 3' telescopic lens camera and the looks of the gearing looks all shiny and new so I don't think any rust is the trouble. My uncled owned this boat since it was new, and he always used TEXACO MEROPA GEAR lube in the unit. When I got the boat about 5 years ago, I switched to QuickSilver High Performance Gear Lube P/N 92-816026A-2. I've changed it twice, kept it full, filter it and inspected for metal each season and all has been well. I switched to the Amsoil 80-90 Marine and the first shift had the metal sound.<br /><br />Does anyone know exactly what the viscousity of the aformentioned quicksilver lube is?<br /><br />Achris60, do you and any experience on the powershifter mechanism and how I can determine if the shift assistor mechanics are working OK. The small switch with the roller end will kill the engine if depressed.

 

[highaltitude]

Re: Shift noise after changing winterization technique

i would be suprised if the oil is causing the noise. the gears will all be turning regaurdless of whether or not the unit is in forward or reverse. might check the gimbal bearing or the ujoints.

 

[achris]

Re: Shift noise after changing winterization technique

Andrew,<br /><br />The total extent of my experience with the MC-II is that I once saw one. The other information I get from the Mercruiser manuals I have. But I do have some info here. Is your unit a TR or a TRS? And which transmission do you have? Series 71/72 or the Mercruiser Model A? Have you isolated the source of the noise? Leg or transmission?<br /><br />As for the best oil? My preference is for the Merc HP. I use it in everything from 2.2hp outboards to Bravo III drives.<br /><br />I am also aware that there's no water pump in the leg, yes. It get water from a pickup in the hull that is drwan by an engine mounted Japsco style pump.<br /><br />Chris..........

 

[andrewgroup]

Re: Shift noise after changing winterization technique

The ujoints and the gimbal bearings were all replaced about 3 years ago and I have about 60 hours on it since. The noise sure seemed to come from the top portion of the outdrive.<br /><br />As for TR or TRS, I'm not sure. I think though it is a transom mount version since everything seems to hang on the inside of the transom via a huge ring assembly.<br /><br />If I think the mechanics of the shift interupter is the problem, can I test this without the engine running? I see that the power shifter appears to draw a vacuum from the manifold. Will shifting it the hard way damage anything?<br /><br />Series 71 vs. 72, Not sure..Any tips to determine.<br />I would love to scan original Merc Docs on this. The aftermarket manuals of that era pay little attention to this drive.<br /><br />Out drive is labeled<br />Kiekaefer Mercrusier s/n 2558875 if that help determine the specifics...I know it to be a 1:1.78 gear ratio drive.

 

[andrewgroup]

Re: Shift noise after changing winterization technique

More info for Achris60.<br /><br />My unit does not have a transmission attached to it. The shift cable goes into the upper drive housing. I did read the TR/TRS had transmissions. Mine is a 327cu.In Chevy V8, with a large engine coupler in the back, the drive shaft from the upper unit goes directly into the coupler. I have one manual that shows a few pictures of this drive but no technical documents. The shop I was able to find the Drive Shaft Bellows in Kentucky said I had a 1:1.78 Type II out drive. Anything you could ad to the equation regarding diagrams would be helpful. Seems in Indiana the old Pro's have died off.

 

[achris]

Re: Shift noise after changing winterization technique

Andrew,<br /><br />Seems we have identified your leg. It's a 1969 (which you did state in your first post), with internal clutching. Unlike the MC-I that has the clutch in the lower gearbox, yours has it in the upper gearbox. The service manual that covers that is 90-68648. It's a 2 book set. I don't have it and the ones I do have, doesn't cover your leg, sorry. I have checked and it's available from www.mercruiserparts.com and they'll want $34.68 of your hard earned cash. (Good investment I'd say).<br /><br />Chris...........

 

[andrewgroup]

Re: Shift noise after changing winterization technique

Thanks Achris60,<br />I have an email to them to confirm this is the correct manual. The parts lookup on their site doesn't give sample pages for confirmation.<br /><br />If you are correct that the clutching is on the upper unit, then maybe the noise I'm hearing has something to to with the lube drained for the winter and some level of freezing up within the upper unit has occurred. I have a top plate that I can remove, and I'll wait to get the manual before I go much further.<br /><br />I suppose having you over for a Beer is out of the question... Indy -05:00 What Zone is Perth?

 

[achris]

Re: Shift noise after changing winterization technique

Perth zone +08:00<br /><br />And I'll have a beer anyway.