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    Fuel pump fitting on V8-430-CE-M Engine

    Fantastic help! Thank you very much.
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    Fuel pump fitting on V8-430-CE-M Engine

    Could someone tell me if the fitting I have circled in this diagram is a water cooling fitting?
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    Volvo Penta V8-430-CE-M Overheating

    It took about 5 minutes :unsure: I'm sure it had been running hot previous trips before without tripping the alarm damaging the impeller enough to lead to a near complete failure at start up that last time and throughout my diagnostics. It was the clear hoses that told me what I needed to...
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    Volvo Penta V8-430-CE-M Overheating

    Looking at other threads I read that grooves worn in the impeller pump cover can cause this problem. So, I flipped the impeller pump cover over as suggested and all of the bubbles went away with the engine running. I checked to see if it would be the case with the tape removed from the out...
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    Volvo Penta V8-430-CE-M Overheating

    That sure does look like a hole but it was just a small piece of the old impeller that came out from behind the back plate in the pump.
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    Volvo Penta V8-430-CE-M Overheating

    The fiber reinforced hose on the right is the output and the clear hose on the left is the input. I can't get the part number right now; the website I use is not working.
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    Volvo Penta V8-430-CE-M Overheating

    Wow, I didn't notice that. I wonder if the debris that caused that hole damaged the original impeller enough to cause it to fail starting this whole mess.
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    Volvo Penta V8-430-CE-M Overheating

    I checked the intake hose again before I started today. I put a lot of tape on the pick up ports on the outdrive and clamped the hose into the pump end of the input hose. I got enough pressure that when I pulled the tape off it sprayed me pretty good. Not a drop inside along the whole length...
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    Volvo Penta V8-430-CE-M Overheating

    The first video is on the lake the second is on the hose.
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    Volvo Penta V8-430-CE-M Overheating

    I am about to the point of spending $700 just to see if a new pump and impeller make everything right again.
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    Volvo Penta V8-430-CE-M Overheating

    Grub54891 and ESGWheel thank you both. That does make sense that it is the pump. I was certain it would not suck water from that bucket and disheartened when it did. Nonetheless, the boat was on Lake Powell for a week in early June during heavy run off. Suspended silts and other fines could...
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    Volvo Penta V8-430-CE-M Overheating

    The boat is a 2019 Monterey MX6 Surf with the 430 V8 and forward drive.
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    Volvo Penta V8-430-CE-M Overheating

    Thank you. I'll cover your suggestions one by one. First no changes or services were done to the boat prior to overheating and melting the impeller the first time. I last used the boat all day and parked it at home the next time out it melted the impeller while going slowly out of the no wake...
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    Volvo Penta V8-430-CE-M Overheating

    Thank you I did that and water from my hose runs freely through it. Also the boat runs normal with a hose connected to the engine flush fitting.
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    Volvo Penta V8-430-CE-M Overheating

    Thank you for the reply. The drive is in the exact position at the lake over heating and on the hose running normal.
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    Volvo Penta V8-430-CE-M Overheating

    I attached a garden hose to the output end of the pick up hose from the raw water pump and taped off the water pick up ports on the outdrive. Low water pressure blew the tape seal of course so I held it tight with my hands and saw no signs of leaking throughout the full pick up hose system. I...
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    Volvo Penta V8-430-CE-M Overheating

    The water intake ports must be covered with tape when the engine runs on the flush fittings; if not the impeller housing heats up. I used an old Volva-Penta-type out drive muff connected to the water intake ports on the outdrive and the impeller housing got hot.
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    Volvo Penta V8-430-CE-M Overheating

    Please help, my V8-430-CE-M overheats only when on the lake. With a gardenhose attached to either flush fitting it does not over heat. The first overheat disintegrated the impeller. I have disassembled and inspected the raw water pump housing and the heat exchanger, installed a new OEM...
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