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Author Topic: Ok, I have a question  (Read 10396 times)

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Offline Hyperacme

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Re: Ok, I have a question
« Reply #20 on: September 26, 2012, 08:34:26 PM »
Should keep him from asking any more questions   ....  LOL
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Offline David CVX-16

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Re: Ok, I have a question
« Reply #21 on: September 26, 2012, 08:37:56 PM »
He must be the world's expert on how to navigate in rough waters. Let's buy him a Glastron Challanger flat bottom boat and see if he can keep up with us on a choppy day on the St. Croix.
« Last Edit: September 26, 2012, 08:41:46 PM by David CVX-16 »
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David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline scott r bishop

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Re: Ok, I have a question
« Reply #22 on: September 26, 2012, 08:51:34 PM »
Quote from: Hyperacme on September 26, 2012, 08:34:26 PM
Should keep him from asking any more questions   ....  LOL
LOL Gregg!  The more free info is provided the more tempting it is to find a way to extract more  :)  Thanks for the detailed explanation.
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1980 CVX-18
1989 CSS-19

Offline Hyperacme

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Re: Ok, I have a question
« Reply #23 on: October 06, 2012, 02:10:59 PM »
OK ... Now I have a question ...

My 1989 Mariner 115 HP motor has two vent holes in top of gear case and one at the bottom.
Why do I have to put gear grease in from the bottom ?


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Offline Rich_V174SS

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Re: Ok, I have a question
« Reply #24 on: October 06, 2012, 02:23:11 PM »
You fill from the bottom so the gearcase fills with fluid in a level manner, pushing air out through the top vent plug as the level rises. If you try to fill from the top you'll end up with air pockets down below where oil will not travel.
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1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline 75starflight

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Re: Ok, I have a question
« Reply #25 on: October 06, 2012, 02:24:21 PM »
Darn Rich you beat me!
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1975 v-179 starflite

Offline MarkS

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Re: Ok, I have a question
« Reply #26 on: October 06, 2012, 02:34:08 PM »
(I believe) The forward screw on top isn't a vent plug/hole Gregg, it's to put grease on the reverse cam (shift) linkage.  I'm a little rusty on my Merc stuff, maybe Rich or somebody can verify?
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Mark
1978 SSV-176

Offline Rich_V174SS

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Re: Ok, I have a question
« Reply #27 on: October 06, 2012, 02:38:14 PM »
Of the two plugs at the top of that gearcase I think one is marked "vent" and the other is marked "oil level". I don't know why during those particular years they decided they needed two upper plugs when just one is sufficient. I suppose they intended to have both open when filling the gearcase but only fill it until the oil comes out of the one marked "oil level". The plug positioned in the center of the gearcase opens into the chamber just below the water pump, above the drive shaft bearing cage to ensure gear oil flows through the bearing before exiting the plug, the other at the front of the gearcase opens into the shift rod cavity. Perhaps they do intend they both be open when filling to make sure the level of oil fills both sections.
« Last Edit: October 06, 2012, 02:45:07 PM by Rich_V174SS »
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1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Hyperacme

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Re: Ok, I have a question
« Reply #28 on: October 06, 2012, 03:19:29 PM »
Merc owners manual says ...
Remove both vent plugs (top two) , Remove bottom plug (let old grease drain) , Fill from bottom drain until grease comes out first vent hole (one to the rear) put plug in, continue filling until excess come out other vent hole,  Replace other plug.
Drain one ounce out and replace lower plug.

Just wondering because trapped air from the top is the same as trapped air from the bottom ... Isn't it ?
Just wanna start a fight ... LOL



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Offline 75starflight

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Re: Ok, I have a question
« Reply #29 on: October 06, 2012, 04:32:48 PM »
If you have air trapped under the oil you will not get the proper lubrication to all points needed. And once that air works to the surface your oil level will be incorrect.
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1975 v-179 starflite

Offline David CVX-16

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Re: Ok, I have a question
« Reply #30 on: October 06, 2012, 04:50:33 PM »
Gregg, did you really cut off a cross section of your lower unit to find the answer?
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David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Ok, I have a question
« Reply #31 on: October 06, 2012, 04:50:54 PM »
Would not air be trapped no matter what ?

Must not be,  but just asking because I don't wanna go out in the cold garage and cut/grind wood/fiberglass ... LOL

Dave ...
Just picked up a multi tool from HF and wanted to test it out ... Works GREAT !
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Offline David CVX-16

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Re: Ok, I have a question
« Reply #32 on: October 06, 2012, 05:22:54 PM »
Great, now find some good metal glue.
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David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Ok, I have a question
« Reply #33 on: October 06, 2012, 05:25:31 PM »
... LOL
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Offline David CVX-16

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Re: Ok, I have a question
« Reply #34 on: October 06, 2012, 05:34:36 PM »
Gregg, get off the computer and back out into that cold garage and work on your boat.
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David
87' CVX-16, 85' 115 HP Johnson, 58.8 MPH GPS w/ 23" SRX Prop

Offline Hyperacme

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Re: Ok, I have a question
« Reply #35 on: October 06, 2012, 06:15:41 PM »
Should warm up next week ....
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