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Thread: MSX 150

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    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    MSX 150

    A buddy of mine just called (GH MEMBER sbronemann)and is going after a MSX 150.I know alot has been discussed about the MSX's on here but it's sorta everywhere.What's some of the high points he should check for or watch for on this model.


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    Rocky_Road's Avatar
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    The MSX 150, upon startup, will do a pretty extensive self diagnosis of all the sensors, and systems. During the few seconds this takes, the check engine light, and symbol, will be displayed. These warning indicators should turn off...if they don't, then one (or more) areas are out of specification.

    The only problem that I have ever encountered, was the waste gate door becoming 'stuck' in the full boost position. Have your friend check the gate lever (it exits the exhaust about midway, and is attached by a rod to the bellows) for free movement.

    Make VERY sure that the engine is run for at least 15 seconds, BEFORE he checks the oil level at the reservoir. The oil level should fall midway between ADD and FULL HOT.

    The coolant does not call for changing for the first 4 years of service...the factory fill is a pink color...any darker color could mean an internal oil leak.

    The owner's manual is available for download at the Polaris site...a perfect way to get acquainted with what you are looking for!

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    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Thanks,Rocky

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    ph2ocraft's Avatar
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    He should test drive and make sure it pulls to MAX RPM's and about 60 MPH GPS.
    If you are going to accelerate the engine while out of the water be SURE to put the craft in reverse first.

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    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    "He should test drive and make sure it pulls to MAX RPM's WHAT'S MAX? and about 60 MPH GPS.IS THAT TOP SPEED?
    If you are going to accelerate the engine while out of the water be SURE to put the craft in reverse first.REASON?"

    THE SKI HAS ABOUT 26 HOURS,ORIGINAL OWNER,OLDER GUY.

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Keddano View Post
    "He should test drive and make sure it pulls to MAX RPM's WHAT'S MAX? and about 60 MPH GPS.IS THAT TOP SPEED?
    If you are going to accelerate the engine while out of the water be SURE to put the craft in reverse first.REASON?"
    THE SKI HAS ABOUT 26 HOURS,ORIGINAL OWNER,OLDER GUY.
    Reverse should engage the RPM limiter, max RPM in reverse is about 3500, I think. I believe the reason for the suggestion is to protect the engine from an over-rev while out of the water.

    Also, check that the reverse cable linkage at the bucket is not bent at the nozzle area (from the reverse bucket hitting things), and that the reverse control and bucket motion works smoothly.

    60mph on GPS - I think that is about top speed on a stock MSX150.

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    Rocky_Road's Avatar
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    Quote Originally Posted by Keddano View Post
    "He should test drive and make sure it pulls to MAX RPM's WHAT'S MAX? and about 60 MPH GPS.IS THAT TOP SPEED?
    If you are going to accelerate the engine while out of the water be SURE to put the craft in reverse first.REASON?"

    THE SKI HAS ABOUT 26 HOURS,ORIGINAL OWNER,OLDER GUY.
    The rev limiter kicks in around 7500. I have registered up to 69 on the ski's guage...if you don't have a GPS, look for at least 64-66.

    I wouldn't 'blip' the throttle much out of the water...even in reverse, my engine has a tendency to 'spool' up...must be the turbo thing!

    26 hours? Original owner? If you friend changes his mind...I WANT IT!

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    ph2ocraft's Avatar
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    Quote Originally Posted by Rocky_Road View Post
    I wouldn't 'blip' the throttle much out of the water...even in reverse, my engine has a tendency to 'spool' up...must be the turbo thing!
    K447 is correct, it needs to limit in reverse.
    Make sure your reverse switch is switching when the reverse mechanism hits the switch.

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    Rocky_Road's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    K447 is correct, it needs to limit in reverse.
    Make sure your reverse switch is switching when the reverse mechanism hits the switch.
    Thanks...I'll check it out, although I know that it has never gone past the reverse limited rpm's. It just seems to have a mind of it's own, if I give it too much throttle, too quickly!

    Oh, yeah...make sure your friend uses 91 octane, if he adds any for testing. The Weber motor requires it....

  10. #10
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Thanks for all the info,He'll be going I think this Friday,He's been real busy at work to get on here.

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