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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    thank you, This carb has been rebuilt twice by the shop and we have even tried a band new one with no change in performance so I'm guessing its not the carb
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    That's the plan. Checking the entire fuel delivery system to the carb. pump is brand new so we will see.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Yes, I understand the setting and what the tape is used for.. I just want to make sure I’m reading the setting correctly. I have not seen a label like this on my other boats. When at 3k rpm the green area of the sticker in dead center of the largest notch on the timing finger, if that makes...
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Does anyone have a picture of the timing mark on both the harmonic balancer and the block? I have a sticker on the balancer
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Yes,that was one of the first places i looked. I even removed the entire unit and had it tested at a distributor shop.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Correct, I have good compression, new power valve, and good fuel.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    I'm going to try a new anti-siphon valve since its a quick check.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Ugh, what a pain
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Is the perfect running up until 2500-2800 RPM, then just lays over.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    We had fouled plugs before adding the new dizzy but now they look good. Our Carb Mech installed a new power valve last week along with a new fuel pump. I checked the timing again yesterday and it's spot on with the sticker and tech info on the engine over, No backfiring or sputtering at all...
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Compression was about 147 on all cylinders, I don't know the prop size off the top of my head other then it's duel prop and was running great all summer, then one day all this happened. I'm going to try a new coil again and retrace all the plug wires but I'm getting to a loss.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Update from this weekend -New ignition module (dizzy) = no change, -New carb = No change -Removed Rev limiter = No Change -Distributer tested good still 2800 rpm, no secondaries.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    thank you,
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    agree, also going to unhook the rev limiter
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    I haven't done an actual ohms test but I had three different sets of cap, rotor, and wires and all did the same. I have my meter now so i can test to be sure.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    totally agree, that's the main reason I'm digging into the ignition since 3 of my 8 cylinders don't register power traveling though the wires on my timing light. Very strange to me.
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    LOL
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    Look what we found
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    one last question for you. Do you agree that power should still be transmitted though the plug wires even if the plug is fouled?
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    89 Volvo Penta AQ271C ignition or carb, maybe something else

    You bet, fingers crossed. I'll let you know about the voltage. I know there is 12V+ while running but i need to look with just the key on.
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