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'86 150 - Is there anything else than to clean/rebuild carbs?

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  • '86 150 - Is there anything else than to clean/rebuild carbs?

    The problem:
    Stalls when attempt to engage gear. Once underway, WOT 1200/1500 rpm. Fast idlee fluctuates back to 400.
    Attempted fix:
    Compression check OK. 108 - 110 all cylinders.
    Drained carb bowls & filled with Sea Foam through fuel lines. Soaked overnight.
    1gal of ring free shock treatment through engine over 3 treatments.
    Engine submerged in 100 gal tub. Water line above anticav plate
    New plugs. Fresh gas w/ stabilizer. Clean fuel filter.
    All timing and idle settings to specs (motor running in tank except for advance timing set statically). Idle good. Fast idle holds steady at 1200 - 1500 rpm
    Back at the ramp:
    Same problem as above. No improvement.
    Question:
    Is "off block" carb clean and rebuild my next step? Is there something else I should check?
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