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    OMC Cobra stern drive

    I have a 1991 3.0L H.O. OMC Sunbird Barletta 208 with a Cobra stern drive. Today when I took the boat out I noticed when I started it that a grinding noise came from the stern drive, with the engine off I raised and lowered the drive and the grinding sound went away only to return when I had the...
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    intake exhaust manifold

    I have a 1991 GM 3.0L engine. What is the correct way to have the manifold checked for possible cracks. I can't see any cracks but is it possible that it can be cracked inside where it can't be seen. Appreciate any help. Thanks
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    engine swap

    I have a 1991 omc barletta sunbird with a 3.0l 4cyl gm engine and cobra stern drive. My question is can I swap the 4 cyl for a inline 6cyl gm engine without major modifications?
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    1991 OMC 3.0L Manifold

    I have a leak at the intake,exhaust manifold. The engine is a 1991 3.0L. I replaced the gasket and I still have the leak. I used a torque wrench and torked it from the middle out at 25lbs. While I had the manifold off I took a straight edge and checked with a .006 feeler gauge to see if it was...
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    prop question

    I have a sunbird barletta 208 with an OMC 3.0L H.O. engine and a cobra stern drive. The prop on the boat is a michigan wheel aluminum 15 x 17. The top speed at wot (4,600 rpm) is 34 mph according to the gps. The boat gets on plane with two people on board at about 3,000 rpm. Is this the correct...
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