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    Any OX66 gurus around? Got an idle issue

    Any help is appreciated. This is an 01 150 SWS 2 with 70 hours on a remanufactured powerhead. I’ve been through the fuel system multiple times. Can confirm 36psi on the rail- injectors sent out and serviced. New fuel pressure regulator- basket screen and VST filter. 2 new low pressure pumps...
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    2001 OX66 150HP High Fuel Pressure reading

    Hey All, Ive got a 01 150 OX66 with a new power head (approx 70 hours). Ive had trouble with idling high, sometimes low and surging at higher RPM. I bough the motor from a marina here on Long Island with a 1 year warranty (now expired). Ive taken the boat back to the marina multiple times for...
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    2001 Yamaha OX66 150 Idle speed creeps up

    I recently purchased this motor with a brand new powerhead installed. It runs great, starts everytime. It's much more reliable than my old 140 Evinrude. I've put about 25 hours on the new powerhead. Recently, when I start it when warm, it'll start and idle about 7-800 rpm. Idle speed will slowly...
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    1985 Evinrude 140 Looper

    I’ve got a low hours (370) 140 looper. Cosmetically it’s in near perfect condition. It’s got low compression in one cylinder (90psi) the others are 140-140-130. I pulled the head and the one cylinder is mildly scored up. Is this motor worth repairing? It’s runs but idles terrible. Making docking...
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    85 Evinrude 140 Idle adjustment

    Hi guys. Got a bit of a problem with my old 140 looper (330 total hours). I'm having an issue with it idleing in water. Put the boat in for the 1st time since I've owned it and had trouble straight away. Over the past 11 months I've replaced all coils, wires, plugs and power pack. I've also...
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    1985 Evinrude 140 fuel hose sizing

    Hi guys. Ive got an old 85 140 looper that came with used boat I've got. I have not had the boat on the water yet. The hoses under the cowl are different sizes and are automotive hoses. I'd like to replace them with coast guard approved hose. In its current setup it has 5/16 to the inline...
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    1985 Evinrude 140 one cylinder won't fire

    1st post here Hello everyone, I've got a low hours (300 hrs) 85 Evinrude V4 looper 140. The engine will run and idle (roughly) on all cylinders but the bottom port side. I've determined that there is spark. I get a 10mm jump easily. I can also determine that there is fuel at the plug. I...
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