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Engine oil pressure light (708)

This is a discussion on Engine oil pressure light (708) within the Wolverine How To forums, part of the Yamaha Wolverine Gen 1 708 cc SxS category; I just got my Wolverine back from the dealer after having the engine rebuilt at 1550 miles after seizing due to lack of oil pressure. ...

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    Silver Bullet Jraoffroad's Avatar
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    Engine oil pressure light (708)

    I just got my Wolverine back from the dealer after having the engine rebuilt at 1550 miles after seizing due to lack of oil pressure. It was all covered by warranty and was called an oil pump failure. There was also another Wolverine in there with the rod sticking out the block, due to oil pump drive nut coming loose.

    It had never occurred to me that Yamaha hadn't include any sort of oil pressure safety on these things. No light, no shut down, not even a check engine light. A $300 pressure washer shuts down if looses oil pressure, how does a $15k SXS not have anything?

    Here is the fix. $25 may save you $4k. There are way too many external oil lines and a know problem with the oil pump on this engine not to have some type of warning for loss of oil pressure. After getting it back I only ran it long enough to load and unload before doing this.

    You will need;

    M16x1.5 to 1/8 npt adapter. These are common as they fit the GM LS engines. I used this one. https://www.summitracing.com/oh/part...jerl/overview/

    1/8 NPT 90. I got this. https://www.summitracing.com/oh/part...1340/overview/

    Wells/Duralast PS117 pressure switch. https://www.autozone.com/external-en...witch/123828_0

    A 12v light of your choice and 6ft or of wire.

    The oil pressure test port is a plug on the front of the engine just below the dipstick. It takes an 8mm allen. Oil pressure spec is 7.3 psi at 1600 rpm. Fair warning, the trained gorilla that installed the factory oil filter used this plug to keep the whole damned engine from spinning around. It is unreasonably tight, way beyond the spec of 25 ft lb.

    I didn't think to take many pics. This is where the sensor goes. The adapter is in and the 90 is started in this pic.


    There is very little room to work in here, you will learn some new words. You need to get the 90 tightened up and pointed to about 11 o'clock.

    Here is the pressure switch.


    Adapter, elbow and PS117 installed.


    Oil lights work by powering the light whenever the key is on. The pressure switch is NC and provides the ground. It opens at a set pressure, in this case 3-5 psi, and the ground is lost causing the light to go out.

    I used a 3/4 led trailer marker light. Very bright, easy to mount and very low amp draw.


    Wiring is simple. Hot side of light (matters with leds) to keyed power source, in my case the helmet light wire that now powers my switch lights, ground side of light to oil pressure switch.

    Good judgment comes from experience, most of which comes from bad judgement

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  2. #2
    Far from stock Atcdan13's Avatar
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    Nice work
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    Thanks for the write up. I will do mine soon.
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    Jraoffroad, Great write-up with all of the details of what you used and pictures. You would think for the price of our SxS they would have a low oil/pressure safety feature built in.
    Jraoffroad and Budro2 like this.
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    Hog Chaser Alexander's Avatar
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    This is something I never thought about.I will definitely do this upgrade also-thank you for taking the time to post this information
    Jraoffroad likes this.

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    This needs to be sticky. Great job.
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    Silver Bullet Jraoffroad's Avatar
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    Glad to see I wasn't the only one that never thought about there not being any sort of warning for oil pressure.
    Good judgment comes from experience, most of which comes from bad judgement

    2016 R spec Black
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    Hunterworks greaseless sheave
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    Quote Originally Posted by LeadSled01 View Post
    This needs to be sticky. Great job.
    Quote Originally Posted by Jraoffroad View Post
    Glad to see I wasn't the only one that never thought about there not being any sort of warning for oil pressure.
    Excellent write up Jraoffroad and I'm sure is appreciated by many! Sticky made.
    Budro2 likes this.
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    Wholigan
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    Yes very good to have. 7PSI seem extremely low from an earlier thread. If there is a port the switch sender goes into. Why not do a pressure gauge all be it more involved.
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  11. #10
    Silver Bullet Jraoffroad's Avatar
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    Quote Originally Posted by Tripplec View Post
    Yes very good to have. 7PSI seem extremely low from an earlier thread. If there is a port the switch sender goes into. Why not do a pressure gauge all be it more involved.
    You could. Not really any more involved, harder to find a good spot to mount.

    A light is way more likely to catch your eye when riding hard then you are to notice a gauge. Most oil pressure gauges start at 5 psi so 7 isn't going to look like much. Besides that, I don't want to look over and see less than 10psi. I did check before putting in the sender and had 25 psi on a cold engine with 10 minutes or less of total run time, so I would want a 0-50 psi gauge. Maybe a fuel pressure gauge would get the range and resolution you need.
    Last edited by Jraoffroad; 06-12-2019 at 09:18 PM.
    Tripplec and MORSNO like this.
    Good judgment comes from experience, most of which comes from bad judgement

    2016 R spec Black
    Superwinch Terra 45
    27x9r12 Bearclaw HTR's on STI HD beadlocks
    Bunch of LED lights
    Hunterworks PCV
    AIS delete
    DIY exhaust tip
    JBS Eibach spring kit
    2" Perfex Lift
    Sway Bar Delete
    Hunterworks greaseless sheave
    14g/.5mm shim/Purple secondary
    Slugged wet clutch
    Super ATV EZ steer power steering
    Super ATV High clearance rear A-arms
    Chopped cage

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