Jetaway oil expansion reservoir?
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Jetaway oil expansion reservoir?

  1. #1
    Glendale Arizona Squirtcha?'s Avatar
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    Default Jetaway oil expansion reservoir?

    exerpt from an old thread. I'm looking for one of these and can't seem to find one. Does anybody know who sells em? Sorry no photo, just a description.

    Quote Originally Posted by johnnynitrous
    Originally Posted by JohnnyNitrous
    nice, thanks. I'm sure I can figure the pipe thread out. Here's another question; I've seen some people with some kind of reservoir attached to where the grease fitting usually is. What is this for? Oil? Is it better than just using a grease fitting?
    Quote Originally Posted by widowmaker View Post
    Oil reservoir for the jet a way. It is there to allow expansion of the oil for the thrust bearing. When the oil heats up it expands and fills the reservoir with oil. That way it does not leak out through the seals.
    Last edited by Squirtcha?; 06-12-2008 at 08:31 AM.

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    Senior Member jetboatperformance's Avatar
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    Squirtcha how bout this little number (from my tranny on my flatty) (Catch can not a reservior) ?? Tom

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    Glendale Arizona Squirtcha?'s Avatar
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    Although that would work, it's a bit more than needed I think. The ones that I've seen only hold an ounce or so, and replace the grease zerk. The beauty of this piece is that if any fluid does rise up into it, it'll gravitate back down to the jetaway.

    The problem I'm having is I'll get just a dripple of jetaway fluid from the rear thrust bearing seal in the mornings and I suspect it's just due to expansion/contraction due to temperature changes. It doesn't seem to leak while I'm driving it. That is to say I'll check it after a run and I don't see any evidence of leakage. Only when it sits over night.

    If I can't find what I need that would work though. I even thought about just running a piece of capillary tubing (small plastic tubing for mech gauges) up the transom so its higher and can bleed off any pressure.
    Last edited by Squirtcha?; 06-12-2008 at 08:55 AM.

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    Boat 502 76Miller's Avatar
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    I know MPD has them, that is where I got mine.

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    Senior Member Ahsumtoy's Avatar
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    Dan,
    I talked to a guy that had one on his boat. He said you could buy it thru McMaster Carr. The problem is the pipe thread on the resevor is larger than the pipe thread on the zerk fitting. To enlarge the thread on the pump, you should take the pump apart so you don't get metal in it while drilling and tapping. So it's not a "no-brainer" deal.

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    Senior Member Boat 405's Avatar
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    mcmaster.com

    catalog page 2139

    Oil Reservoirs

    Order the 1/8 npt. What he said above about enlarging threads

    Size is 2.5" diameter and 2.75" tall holds 1.75 oz
    Last edited by Boat 405; 06-12-2008 at 09:23 AM.

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    Glendale Arizona Squirtcha?'s Avatar
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    Thanks guys

    Dan

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    Default oil expansion reservoir?

    Hey Dan I found the oil expansion reservoir I got from Jack I will get it sent off to you.
    Last edited by Tn River Ratt; 06-12-2008 at 07:05 PM.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    you can buy those truck rear differential vents at most parts stores, then just run long hose from the jetaway up into the transom capped off with that vent, it'll let the heat out and give the oil just a tad of room to expand. we had to do this to my uncle's dps racthet a few wks back

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    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by Tn River Ratt View Post
    Hey Dan I found the oil expansion reservoir I got from Jack I will get it sent off to you.
    I need to get off to work, but wanted to take just a minute here. This is so damned cool. Matt (the previous owner of the boat) looked up the rebuild here on the boards and we exchanged numbers. He's in Tennessee now and gave me a call yesterday. I got to find out a lot of the history (and clear up some of the mystery) about my boat. We talked for probably half an hour yesterday and this is him responding to my post about the reservoir.

    Gotta say this was a very cool thing for him to do. Some guys would just be glad to have the deal done and never dream of contacting the buyer to help him out.

    Thanks a ton Matt. Wish you were closer so we could go boating.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    I need to get off to work, but wanted to take just a minute here. This is so damned cool. Matt (the previous owner of the boat) looked up the rebuild here on the boards and we exchanged numbers. He's in Tennessee now and gave me a call yesterday. I got to find out a lot of the history (and clear up some of the mystery) about my boat. We talked for probably half an hour yesterday and this is him responding to my post about the reservoir.

    Gotta say this was a very cool thing for him to do. Some guys would just be glad to have the deal done and never dream of contacting the buyer to help him out.

    Thanks a ton Matt. Wish you were closer so we could go boating.
    way to go matt, and welcome to the site

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    Senior Member bp298's Avatar
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    Quote Originally Posted by IMPATIENT 1 View Post
    you can buy those truck rear differential vents at most parts stores, then just run long hose from the jetaway up into the transom capped off with that vent, it'll let the heat out and give the oil just a tad of room to expand. we had to do this to my uncle's dps racthet a few wks back
    the little reservoir that mpd sells mounts to the top so that oil can drain back into the bearing when it cools down. right now, the glass on mine is all red, but the reservoir is completely empty and nothing leaked out. many commercial pumps have these things installed as site glasses to monitor bearing oil level.

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    Senior Member Ahsumtoy's Avatar
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    Quote Originally Posted by bp298 View Post
    the little reservoir that mpd sells mounts to the top so that oil can drain back into the bearing when it cools down. right now, the glass on mine is all red, but the reservoir is completely empty and nothing leaked out. many commercial pumps have these things installed as site glasses to monitor bearing oil level.
    Are the threads on the reservoir the same as the same as the grease fitting?

  16. #14
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by widowmaker View Post
    mcmaster.com

    catalog page 2139

    Oil Reservoirs

    Order the 1/8 npt. What he said above about enlarging threads

    Size is 2.5" diameter and 2.75" tall holds 1.75 oz
    Quote Originally Posted by Ahsumtoy View Post
    Are the threads on the reservoir the same as the same as the grease fitting?
    I had to wonder the same thing Steve. I've got an 1/8" NPT plug in it now. If this reservoir is 1/8" NPT how can it have different threads. It should be the same thing.

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