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  1. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Thank you very much, I'll give them a call.
  2. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    I've dealt with gaugesaver in the past and unfortunately they don't have a way to fix these since they cannot power them on and also do not have the parts. I might have some luck with Teleflex or the other manufacturer for the gauge. Otherwise I would've replaced it with another if there was one...
  3. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Understood, I'll have to just source someone to repair it. Seller has a return window open for 15-30 days so I will be good if it ends up not working out. In regards to the pitot hole on the Bravo drive how far does the wire or drill bit need to go? I have the earlier generation bravo and the...
  4. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Update, disconnected pitot tubing from the Speedo... It works but pitot hole is clogged somewhere farther in the drive. I tried blowing air into it and it does not budge at all. At least the speedo issue is fixed after I get this salt/calcium/whatever it is blocking the drive pitot hole out...
  5. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Any of you guys know if there's a place that repairs these smartcraft gauges? The 4 in 1 gauge I have 780903SDFB I cannot find anywhere for the life of me... The ones on greatslakeskipper doesn't have the functions I need, which are oil pressure, temperature, trim, and volts. The ones they have...
  6. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Awesome, thank you! The quicksilver one I just got in is identical.
  7. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    How did you set up the GPS with the smartcraft gauge out of curiosity if gaugefinder can't fix my gauge? Any idea which NMEA it is 2000 or 0183? I don't have a GPS on the boat but I have seen that it's a possibility to set it up with a GPS puck/receiver.
  8. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Which one? The one I mentioned in the beginning? I'm talking about the one that's on the power steering cooling in the diagrams. 881879T10/881879010 Here's what I'm talking about. https://www.mercruiserparts.com/mercury-mercruiser-71-8m0157742-sensor-p You did help me just now solve what I was...
  9. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Understood, I may as well just replace it with a new one and check if fixes the fault. The pitot hole on the lower wasn't clogged miraculously. I'm assuming all that's left is that sensor as it was in brackish/fresh water. The manifolds and riser only had 182 hours on them and they were in...
  10. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Is there anyway to check to see if the speedo is working when it's on a trailer? I'm assuming maybe I can use a hose to blast water into that hole on the bravo drive and see if it works? In regards to the oil pressure I have the smartcraft bluetooth device installed, I'll have to check if it's...
  11. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Well, alternatives but made in the US. I was able to find on neweagle.net the OEM Quicksilver/Merc sensor for the water pressure for cheap but the oil sensor I had no luck since they're out of stock and only have the 0-150 PSI sensors which have a different plug. Now even the Merc/Quicksilver...
  12. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    I figured it may be a clogged pitot hole in the bravo drive, it has been a while since I have taken the boat out and it's been sitting winterized. I'll have to check in with gauge saver and see if they're able to repair it. The oil pressure on that gauge itself doesn't even move when it's off or...
  13. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    The oil pressure on the 4 in 1 gauge is not showing up and the speedo gauge is a separate gauge where I don't have the speed showing up alongside with the Pitot Pressure Sensor fault.
  14. M

    Mercruiser 5.7 MAG MPI Water Pressure Sensor & Oil Pressure Sensor Interchange/Alternatives + 4 in 1 gauge not showing speed and oil pressure

    Anyone have any luck finding alternatives to those sensors mentioned above? 881879T11 Oil pressure sensor 881879T10/881879010 Water pressure sensor I have an issue on my Chaparral 236SSX with a 5.7 MAG MPI where the 4 in one gauge is not showing any oil pressure or showing any speed on the...
  15. M

    Finding out if 8.1 Engine is HO or Base?

    I ran my engine serial number through the database to find out which 8.1 it is on Mercurys website and it pulls up 4 engines which 2 are in my serial number range... Is there anyway to tell if it's an HO or Base by looking at it? Serial number - 0m318790
  16. M

    PCM MEFI 3/4 Question regarding hours

    Got it, sounds good. It was Google's AI that spewed that consensus about the hours not being able to be erased or changed. I was able to finally get service records for this boat from Singleton Marine and it looks like they swapped out the ECU and had it approved by PCM.
  17. M

    PCM MEFI 3/4 Question regarding hours

    Got it, online it was saying it's impossible to reset the hours on it so that's why I was confused. I'll have to check the hours on the Perfect Pass then and if that doesn't work maybe the dealer it was serviced at can let me know what went on with it.
  18. M

    2003 Four Winns 268 Vista Main Harness Wiring

    5.7 GXI and DPSM with Kohler 5E Generator and Water Heater. It's also equipped with a fireboy extinguisher. I found the owners manual on Four Winns website. Page 252 shows the schematic... Am I seeing it correctly that the purple wire lead goes also to the Fireboy Extinguisher Indicator...
  19. M

    2003 Four Winns 268 Vista Main Harness Wiring

    Hi all, I'm redoing the barrel connector plug on the main harness that plugs into the engine harness, the pig tail I purchased I was able to match up all the wires from the original boat harness aside from one that I want to be sure before it's reconnected. The new barrel pig tail has a...
  20. M

    PCM MEFI 3/4 Question regarding hours

    Thanks in advance, I have a question regarding MEFI 3/4 ECUs, I'm trying to sort out for sure what the real engine/drivetrain hours on a 2006 Nautique I bought are... The hours if I'm not mistaken on the buggy Faria Gateway gauge is 1127.7 Hours and for the hell of it I scanned the engine...
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