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    Rev limiter value

    I'm trying to re-prop the boat and making runs with different props to check performance, verify WOT, etc. I have the diacom cable and software hooked up so I can monitor the engine (5.0 GXi-E)....specifically the engine speed. I went down in prop size and the motor didn't rev any faster so i...
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    Need different prop for pulling

    Currently have a Volvo 3 blade stainless 14.75x21 on my 2006 Regal Destiny. I believe it is 22.5' with the swim platform and comes in about 3400lbs. Running a VOLVO Penta 270HP 5.0GXi with 1.66 SX drive. It works good for 2 people and even when we had 7, I could pull a skier with some effort...
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    Would high fuel pressure cause misfire

    Fuel pressure is high at 70-72 psi. Can even smell gas, so it is running rich. It idles OK, but around 2500 RPM it develops a miss. This is all in the driveway, BTW. The plugs, cap, rotor, and wires all have under 5 hours (probably closer to 2) on them since replacement. While I wait for my...
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    Coupler alignment

    Dropped in the new motor (5.0GXi) and trying to align the coupler/engine to the outdrive (SX). Right now, after some adjustment, the bar slides in like butter, but there are still heavier lines at the 3-oclock position. How do I adjust for that location? I know how to move it up or down, but...
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    Any reason I couldn't run the engine without the drive attached?

    5.0 GXI with SX-C1 drive. I have the new motor put in and wanted to be sure I have everything hooked up correctly and its ready to go and runs before putting the drive back on in case I have to pull it back out for some reason. I have the hose connection on the raw water intake hose going to...
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    Missing hole under water pump

    I am transferring my water pump from my old block to my new block. Both are 878 castings (5.0GXi motor), but my old block has an extra hole for the water pump that the new block does not have. Is this an issue? The water pump has the hole. The old block in the pics is red. The new one is...
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    Setting engine valves

    This is for a 5.0Gxi motor. Typical 305 Chevy vortec engine. I am setting the valves after a rebuild. I have seen (including different posts here) 1/4 turn, 1/2 turn to 3/4 turn, and the volvo manual says 1 full turn past zero lash. Any consensus as to the "correct" adjustment?
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    Confusion on 5.0OSi-E motor

    I have a 5.0OSi-E motor in my Regal. My understanding is that this motor is identical to the 5.0GXi-E with the only difference being that the OSi uses the XDP outdrive while the GXi uses the SX outdrive. Therefore, everything should be the same for mine as a 5.0GXi. Although a google search...
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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    Still trying to troubleshoot my issue. This is a 5.0OSi-C (maybe a D...it was built in 8/2003). Took my Diacom data to a local Volvo mechanic to get some feedback and suggestions. FIrst of all, he asked if the ECM was in break-in mode. He said the ECM will limit the RPM to ~4400 RPM during...
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    Fuel pressure bleeding off 5.0 OSi-E

    In trying to troubleshoot my low power issue (you can read about that here: https://forums.iboats.com/forum/engine-repair-and-maintenance/volvo-penta-i-o-inboard-gas-engines-outdrives/10785351-5-0-osi-e-low-power-unable-to-hit-rpm-wot if you are really bored), I am starting with the basics on my...
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    5.0 OSi-E low power, unable to hit RPM & WOT.

    Background...I have been trying to troubleshoot this low power issue for a few weeks now. The motor while trying to get on plane basically stalls out at 3000 RPM until it finally gets on plane after about 10 seconds then maxes out at 4300 RPM. The boat is a Regal 2120 (21 foot boat I believe)...
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    Trying to read codes from the DLC unsuccessfully

    I am still trying to see what if any store DTC's I have on my ECM. My engine is an 5.0 OSi-E (serial 4012110198) using an MEFI 4 (4b I think) ECU. My understanding is that putting the ECU in Service Mode will cause the ECM to flash stored DTC's. I believe it is also supposed to flash code 12...
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    Anybody have a tunerpro definition file for a MEFI 4b?

    Self explanatory. Just looking to do some troubleshooting and need a definition file to use the software. Thanks!
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    Diagnosing DTC 44 (Knock sensor circuit)

    I have DTC 44 on my 5.0 OSi-E (serial 4012110198). I am going through Volvo's manual on troubleshooting and on step 5 it says to disconnect J1 and check J1-17 (knock sensor circuit) to ground. Value should be "93-107k ohms. My first question: is that 93 ohms to 107,000 ohms? That seems...
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    Unable to clear ECM codes on 5.0 OSi-E motor

    I put this rebuilt motor into my boat in 2017 and it sat all last year while we moved. Now, while it runs well, it seems to have low power and tops out at 4300 RPM (scan tool and tach both read the same). I have a Rinda techmate scan tool (picture attached) so I hooked it up to see what it...
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    Links not opening/working

    Trying to access MPI fogging procedure on the VP DIY sticky page item 21 on http://forums.iboats.com/forum/engine-repair-and-maintenance/mercruiser-i-o-inboard-engines-outdrives/366271-vp?_=1508082118469 . When I click on the link a new page opens, but it is blank. I have tried 3 different...
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    Reading codes/data from ECM

    I like having tools to fix and troubleshoot my vehicles. With my new to me boat and a Volvo 5.0GXi motor, the ECM has a lot of information that I don't currently have access to . I would like to be able to access that data. It sure would have been handy this weekend when my engine alarm...
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    Overheat diagnosis question

    I have the clear hoses hooked up to diagnose my overheat issue. You can see from the video that I am getting air before the raw water pump...and more after it...but I figure I should get the incoming air leak fixed first. I did this with the drive on muffs. My question is if this is valid or...
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    Leaking power steering actuator

    While trying to troubleshoot my overheating, I noticed power steering fluid in the bilge. I finally found it dripping from the actuator. The drops were coming from the area circled in the photo. Seemed to be dripping off the pin or cotter pin in that area. All the hoses and fitting were...
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    Unable to shift without turning prop by hand - NOW WITH VIDEOS

    SX-M1 drive (3869337 ser # 4202165914). Just getting ready to try out the new boat but once I shift into gear, I can't get it back in gear without turning the prop by hand. I just refilled the drive after replacing the shift piston seal. I noticed when doing the prop rotation during the pressure...
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