Msx 150 problem

[Tomskaar]

I have an msx 150 which I just put in water for first time after visit to dealer for tune up and oil change. Ran fine for about an hour but then would not go above 10 mph. No problem with rpm but acts like a prop driven machine would when cavitating.

[HiPeRcO]

Welcome to Green Hulk! If you don't have any RPM limit, then it sounds like a pump problem. You should pull the pump and inspect. You should also check the oil level (not likely related to your issue though) it is common for these to be overfilled.

Lots of good reading here:
https://sites.google.com/site/polari...10-and-msx-150

[HiPeRcO]

Also, before removing the pump, look in the intake grate for something stuck in there (seaweed, sticks, ropes, etc)

[Tomskaar]

Also, before removing the pump, look in the intake grate for something stuck in there (seaweed, sticks, ropes, etc)

I actually did think of that and checked the area around the disharge end of the pump. I assume the intake is on the bottom of the watercraft? Have never turned it over. I am not a mechanic. Is removing the pump complicated?

[HiPeRcO]

Yes, the intake is on the bottom, near the back (at the front end of the ride plate (the metal part on the bottom of the hull)). Do you have the machine on a lift/hoist? If not, you can try reaching under the machine with it in the water, to feel if there are weeds stuck there (quite possible). Otherwise, put the machine on the trailer then crawl underneath on your back with a flashlight and have a look.

Removing the pump is not hard (4 bolts), but you need to check the intake first.

[Tomskaar]

You were absolutely correct. Intake was full of weeds. I should have guessed that. Thanks so much for the tip. Saved me a trip to dealer and I would have felt a bit silly when I got there.

[ripcuda]

At least you didn't suck up a tow rope! Those are the worst.

Is this a new ski to you? Would love to hear about a good running MSX 150!

Cheers!

[HiPeRcO]

Glad you got it working. Yes it would be nice to hear about a good running MSX 150