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    96' Merc 150hp EFI Smokes and surges when throttling up under load

    So today I was able to put a fuel pressure test kit on it. Was 35 psi at idle and dropped to 34 psi on throttling up. 1 min after shutting off motor psi was 34, five min was 32 psi and 15 and 30 minutes were 31 psi. Storms moved in so did not get to see an hour psi. While putting top cowling on...
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    96' Merc 150hp EFI Smokes and surges when throttling up under load

    I pulled the injectors and did a total clean out job. Pulled injectors, fuel rail, and the micro screens at inlet of injectors, soaked and cleaned them. Pulled and checked o-rings set aside. Then used a 2 foot long 3/8" hose with hose clamps and inserted base of injectors into one end then hose...
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    96' Merc 150hp EFI Smokes and surges when throttling up under load

    This is a picture of what the fuel looks like in the VST after doing everything above and testing the work done. It looks dark to me...... but I do not claim to know what it should look like. Also my motor serial# 0G423221. Thanks!
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    96' Merc 150hp EFI Smokes and surges when throttling up under load

    I have been working on my 96' 150 horsepower EFI Mercury. I just received this boat as a hand-me-down from my father. The boat ran fine when it was parked 2 years ago. I took it on the lake last weekend and it idled rough, would try to die when putting under load, and could not reach plane...
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