Recently I changed the low pressure fuel pumps on this motor and it has run great, but when I trottle down or idle it drops to 4-5k on the Tach and is going dead. It cranks right back. What can I check outside of adjusting the idle itself?
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2000 Yamaha 150ox66
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no idle adjustment on that engine.
it either runs correctly or its broke.
could be bad plugs, plug caps, clogged injector filter/filters.
clogged pressure regulator filter, engine will run to high on the fuel rail pressure and cause an over rich mixture.
could be a bunch, but leave the shutter screw alone.
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