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Old 06-09-2009, 03:21 PM
willyt's Avatar
willyt willyt is offline
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Join Date: May 2009
Boat: ER xstar
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MCX Engine issues

Hey ya'll
While wakeboarding (04 xstar) the other day we had the low oil pressure alarm come on twice (gauge read 0). We turned it off immediately, let it rest for a couple minutes and fired her back up with normal oil pressure (25-40 PSI). We checked the oil level and it looked fine, boat was not running hot either. Other than the oil pump, could this be anything else?

Another issue we had was a little lifter tick in the engine. One of my other friends has an 04 tige with the GM vortec 5700 (from what I understand the MCX and this engine are very similar) and had the same lifter tick. Ran some valve cleaner through it and havenít heard the tick since. Wanted to know if anyone has had similar problems with the MCX.
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Old 06-09-2009, 03:47 PM
flipper's Avatar
flipper flipper is offline
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Join Date: Mar 2005
Boat: 1991 Prostar 190, fuel injected 302
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Could be a bad filter. I've seen this happen where the filter will collapse. I would say it's the sending unit, easy fix, but the valve tick makes worry a little
Lots of power is good, more is better, too much is just right.

'91 prostar 190
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Old 06-09-2009, 03:48 PM
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AFX-30 AFX-30 is offline
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Boat: Mastercraft X-30 2001 5.7L Indmar
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I would pull off the valve covers and ck your rocker arms to see if one has maybe come loose. On the oil press problem the first thing I would do is check the pil pressure sending unit and the oil press alarm switch.
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Old 06-09-2009, 04:34 PM
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JimN JimN is offline
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I would look into the oil filler hole and see if you have oil running from the higher valves (front of the motor, not the boat) to the lower ones. If you see no oil at any RPM, use a mechanical oil pressure gauge.
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engine, lifter tick, mcx, trouble codes, x-star

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