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Reverso questions

Discussion in 'Technical Discussion' started by TahoeJohn, Nov 7, 2020.

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  1. TahoeJohn

    TahoeJohn Member

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    Aug 8, 2020
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    Tahoe VIsta
    I'm starting to dig into the various systems of our new-to-us boat and am trying to figure out the oil change setup that came with it. Here's the general layout:

    reverso.png

    I'm not sure why there are two outlets / inputs on the right side. One has a brass fitting on the end with a cap, and the other is just a raw end of the hose.

    A couple questions:
    1) Why did they not plumb in the gearboxes? Here's a picture of what I'm assuming is the drain plug:

    marine gear.jpg

    With this setup, do I just drain the gearbox into a pan and simultaneously suck it up with the spare / 5th hose on the left side? Should I consider at least installing a valve onto the gearboxes at the next change? Any reason not to plumb the 5th hose to this and add a 6th hose for the other gearbox?

    2) Why install the drain valve on the outboard of the starboard engine? It's not impossible to get to, but wouldn't it be more convenient to have it on the inboard side of both engines? The pans on the engines (3412e) appear to have identical drain ports on either side of each engine.

    Thanks in advance...
  2. Pascal

    Pascal Senior Member

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    Yes the gears should have been plumbed and yes I would add valves and run hoses to the manifold.

    If adding a 6th valves to the manifold is not possible, you could add an external 3 way valve to select port or stbd gear.
  3. cleanslate

    cleanslate Senior Member

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    TahoeJohn !
    Very nice , detailed thorough post !
    I don’t know but it seems to me a lot of the builders do not plumbed the transmission /clutch into the oil exchange unit.
    It makes sense but the clutch does not hold that much oil and it’s kind of good to dump it out into a pan or a bucket and inspect the oil that came out for any metal fragments or shavings
    etc.
    Not so easy to inspect when it goes through the oil exchange unit into a enclosed pail in my opinion.
    Maybe good to keep it as it is .
    It’s your call.
  4. Boomer

    Boomer Senior Member

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    Remember you need to get a fitting and hose into that little space...may not have been able to make it work with the limited space
  5. Pascal

    Pascal Senior Member

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    If you can put a fitting and a valve, how would you fit a pan to drain the gear?
  6. Capt J

    Capt J Senior Member

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    He could just put a valve with a hose fitting and run an extension hose from the 3' capped hose he already has.....would be easy enough......I've also put a small bucket container under a gear and ran my oil change pump into it and sucked it out as fast as it drained into the small container......
  7. TahoeJohn

    TahoeJohn Member

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    Yup, I think that this latter method is the only choice I have for the next gear oil change. After that, I like Capt J's idea -- just a valve into the gearbox drain plus a fitting (for the hose end) and that would be done, no more valves to install in the main manifold.

    BTW, there's plenty of room for a valve. The aluminum diamond plate in that picture is actually quite a bit higher up. Hard to tell from the picture...