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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    That is all it is achieving. At some point, it has gone to 4990 (according to the ECU). My normal max is 4400-4500. Nothing on the top 40% of the throttle. Maybe that is normal for an MPI motor. This is the first one I have had so it may just be getting used to how this motor performs...
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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    It maxes out at 4400 RPM normally. I think the 4600 was with the 15 MPH wind. So it normally maxes out at 4400 RPM. I can lower the throttle from full to 60% and there is no decrease in boat speed or engine RPM. It just seems sluggish out of the hole and I have never had a boat that you...
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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    The boat was not running when I bought it. It had the 4.3L V6 in it when I got it. IT was trashed from salt water. I found this larger motor already rebuilt for about what it would cost me to repair and rebuild the old motor...plus I get some additional horsepower. The rebuild was done by a...
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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    The plugs shown in the picture were NGK I think. They were the recommended ones from the manual. I wasn't 100% confident in them so I replaced them again this year with AC Delco 41-101 iridiums. No change. And, yes the motor is MPI. Same as the 5.0Gxi motor. Thanks.
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    Trouble shooting low WOT RPM - timing on the 5.0OSi

    The start of this can be read here: https://forums.iboats.com/threads/5-0-osi-e-low-power-unable-to-hit-rpm-wot.725345/ still trying to figure it out.
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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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    Quick alignment check

    I just installed my new motor and this is my first time aligning the motor/gimbal and I just don't want to screw it up...so I made some videos showing the alignment bar after checking at 0, 90, 180, and 270 degrees. They are each very short just showing two rotations of the bar. I was hoping...
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    Bad tire wear

    I have a 2010 Venture VATB-5225 tandem axle trailer that I got in April. I was told it was only towed from Massachusetts to Florida and then I brought it from Florida to Indiana. When going over the trailer (bearings, brakes, etc.) yesterday, I noticed the front drivers tire had A LOT of wear on...
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    What trim fluid to use?

    My old pump is a 3819847. My pump does not have a sticker on it, but I see a lot of the replacement pumps have a sticker on them that says to use 30W oil only. My manual says to use volvo trim fluid and no mention of 30W oil anywhere. The current fluid in my pump looks darker and browner than...
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