upper or lower ?
12-09-2009 | 11:24 AM
#22
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
Buy the stock XR caps from Merc for the XR's. They already have the bearings and race installed. Price is hard to beat too!
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bring a smile to your face when pushed down the stairs.
12-09-2009 | 02:32 PM
#23
Charter Member #601
Joined: Dec 2000
Posts: 3,276
Likes: 5
From: Holland, Mi USA.
With any new cap the deapth of the race needs to be measured between old and new and the race thickness adjusted to compensate or the new cap will affect gear lash.
And use studs on the cap..
Dick
And use studs on the cap..
Dick
12-09-2009 | 04:18 PM
#24
Registered
Joined: Jan 2004
Posts: 5,325
Likes: 112
From: Northern NY
Would this be the case if installing a new Merc cap in place of an existing Merc cap?
Would it be an issue if new cap was part of a rebuild where the entire drive is done with new gears, bearings etc?
12-09-2009 | 07:18 PM
#25
Charter Member #601
Joined: Dec 2000
Posts: 3,276
Likes: 5
From: Holland, Mi USA.
This is an issue any time you attempt to just swap caps.. They should be measured. The XR ribbed cap I use has a little bit different depth than a standard XR and lot on a standard B1.
If the drive is being set up with new gears and the lash is done by the new method Merc uses, then the cap doesnt need to be measured, because in the process the gear depth is set by adjusting the shim for proper lash. In other words it takes care of it.
Hope that helps.
Dick
If the drive is being set up with new gears and the lash is done by the new method Merc uses, then the cap doesnt need to be measured, because in the process the gear depth is set by adjusting the shim for proper lash. In other words it takes care of it.
Hope that helps.
Dick
12-12-2009 | 05:09 PM
#26
Thread Starter
Registered
Joined: Jul 2002
Posts: 2,233
Likes: 1
From: pa
rssteiny,
I have two customers with 32 AT's. One with XR's on stand off boxes and one with XZ's without. Both are running Imco -2". Both in the 700hp range. The one with the XR's wore the gears out.. The one with the XZ's the uppers are still going strong. Not really an apples to apples. But my opinion has always been that if you dont have enough power to snap the teeth off of the helical gears, they will last longer. Both boats have been driven with respect, that is THE most important factor. A properly setup B1 with good top cap, will go a long way when driven with respect.
The lowers are better with the XR propshafts, especially if air time happens and you dont have the feel for driving in that type of water..
XR upper gears have been snapping teeth off in the past couple of years, where they weren't before that. Hopefully someone will solve that problem in the future..
If you want to put bigger power and drive it without respect.. Then you will be better to step up to a drive like the SCX..
But everything will break if you try hard enough..
If you have questions.. pm me or you can call me.
Hope this helps.
Dick
I have two customers with 32 AT's. One with XR's on stand off boxes and one with XZ's without. Both are running Imco -2". Both in the 700hp range. The one with the XR's wore the gears out.. The one with the XZ's the uppers are still going strong. Not really an apples to apples. But my opinion has always been that if you dont have enough power to snap the teeth off of the helical gears, they will last longer. Both boats have been driven with respect, that is THE most important factor. A properly setup B1 with good top cap, will go a long way when driven with respect.
The lowers are better with the XR propshafts, especially if air time happens and you dont have the feel for driving in that type of water..
XR upper gears have been snapping teeth off in the past couple of years, where they weren't before that. Hopefully someone will solve that problem in the future..
If you want to put bigger power and drive it without respect.. Then you will be better to step up to a drive like the SCX..
But everything will break if you try hard enough..
If you have questions.. pm me or you can call me.
Hope this helps.
Dick
12-13-2009 | 02:30 PM
#27
Registered
Joined: Aug 2008
Posts: 774
Likes: 1
From: Wild n Reckless From North Texas
Very true! And then sometimes even when abused.
A friend of mine took both of his mid 90's drives and made his own steel towers for the uppers and also his 1" thick AL billet caps. Studded the housing and never had a drive break yet. He is running huge power (don't know HP, other than it pushes his 32 Fever in the upper 90's) This was a good 3 yrs ago, still going strong. He is also using the original gears, not the upgraded X-gears. Last yr he was makeing a video of his boat in front of our marina and was going full throttle from a dead stop to test the drives and caps. He uses his boat as a test platform since he does the steel tower and custom caps as a sideline of his business. He knows just 1 speed when out running, and it ain't slow.
A friend of mine took both of his mid 90's drives and made his own steel towers for the uppers and also his 1" thick AL billet caps. Studded the housing and never had a drive break yet. He is running huge power (don't know HP, other than it pushes his 32 Fever in the upper 90's) This was a good 3 yrs ago, still going strong. He is also using the original gears, not the upgraded X-gears. Last yr he was makeing a video of his boat in front of our marina and was going full throttle from a dead stop to test the drives and caps. He uses his boat as a test platform since he does the steel tower and custom caps as a sideline of his business. He knows just 1 speed when out running, and it ain't slow.
Is there a website?
12-13-2009 | 08:53 PM
#28
Charter Member #601
Joined: Dec 2000
Posts: 3,276
Likes: 5
From: Holland, Mi USA.
rssteiny
I dont know the full setup on both boats.. I know the one without boxes is 700hp at around 90mph, with 4 blade props. The other with boxes was a tad faster, I think and ran 5 blade props. That is all I can tell you. If you pm me your number I can give it to them and see if they would call and talk to you about it..
Dick
I dont know the full setup on both boats.. I know the one without boxes is 700hp at around 90mph, with 4 blade props. The other with boxes was a tad faster, I think and ran 5 blade props. That is all I can tell you. If you pm me your number I can give it to them and see if they would call and talk to you about it..
Dick
