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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

    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.
  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

    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...
  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 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...
  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

    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...
  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

    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...
  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

    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...
  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

    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.
  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

    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...
  9. 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
  10. 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.
  11. 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.
  12. 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...
  13. 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...
  14. 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...
  15. M

    2005 Volvo Penta 5.7 OSXI-DF

    21608511 21545138 are the part numbers, here's an amazon link below to get an idea. VP High/Low Fuel pump kit
  16. M

    2005 Volvo Penta 5.7 OSXI-DF

    Yup, the HPFP was weak on the original fuel pump. It started up and ran without any problems right after I changed out and cycled the key. Any recommendations for the LPFP or HPFP replacement by any chance? I'm sure there's some solid companies who make quality fuel pumps for these VPs
  17. M

    2005 Volvo Penta 5.7 OSXI-DF

    The LPFP has good power but the high pressure fuel pump isn't pushing out fuel as I would expect it to. The other two pumps I removed from other engines push it out like a fountain, this one I would cycle the key 2/3 before it slightly poured out of it. I have a new chinese pump coming in to...
  18. M

    2005 Volvo Penta 5.7 OSXI-DF

    I checked it it's in time, I'm thinking it's a weak HPFP. 0 PSI with a gauge on top of the rail. Removed the regulator and it's barely dripping out of there cycling the key on and off. Regulator screen was slightly clogged up, only 10% of it. It's been changed out before. I checked the HPFP on...
  19. M

    2005 Volvo Penta 5.7 OSXI-DF

    No, guy is doing an outboard conversion. One drive was in working shape and other XDP had a shattered lower unit from oysters apparently. Ended up being much cheaper for an outboard conversion than pay for removal/install of inboards, one new inboard engine, and a new XDP/conversion to DSPM
  20. M

    2005 Volvo Penta 5.7 OSXI-DF

    One of the engines is locked up completely. Unsure of what it is. They're both very low hours. I'll have to check but from what the seller told me is that they just unplugged the coils to the distributor but that's about it. I didn't see any markings indicating that the distributor itself was...
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