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    High oil pressure? 5.7 with 10 hours

    I just changed the break in oil out of my new engine at the 10 hour mark. The place I bought the engine from said to use straight 40 weight. The manual calls for 30 but I live in south Florida and will be changing the oil again before the fall after another 50 hours so I followed what they...
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    Oh man. HUGE mess with oil filter.

    I was changing the oil in my new engine yes. It is the 10 hour oil change to change the thin break in oil. The engine has only been in for about a week now. The filter was put on when we installed it about a week ago. I only put the filter on with my hands, no wrench. Yes when I went to...
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    Do you have to remove lower unit to change front zonc on Cobra drive?

    I was looking at the OMC manual for my Cobra and I cant find a spot that says how to change the zincs. i did find a spot in the outdrive section that says that when you are putting the lower unit back onto the outdrive to install the zinc FIRST. So this would lead me to believe that to change...
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    Prop? Low WOT RPM? New engine.

    Hi all! I have a 25ft Donzi with a brand new OMC 5.7 350 with Cobra outdrive. The boat currently has a 15.5 dia 15pitch prop on it. I just got a new tach because my old one didnt work so now I can try to get the right prop. At WOT I can only reach 4200 RPMs. I dont think I would want to...
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    Engine Bogs at almost WOT. Can only reach 4200 RPM.

    I have a new engine with an edelbrock 1409. I finally got around to getting a new tach because my old one was bad and not accurate. Now that I have a new one I can try to figure this out. At about a little over 3/4 throttle I can hear what sounds like the secondaries opening. But there is...
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    New engine questions.

    I installed a new 5.7 OMC (Cobra drive) yes. I took it out today for a test run. I am not sure if my tach gauge works correctly. the guy I bought the boat from said that it works when it wants too. It has always "worked" for me as in it moves but I dont think it is accurate. On the old...
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    New engine flywheel from old doesnt fit coupler?

    I was trying to swap out my OMC 5.7 engine with a new one today. The guy at the place I bought my engine said the old flywheel would fit but I think that the old engine is a car engine and thats why it has a different flywheel on it. Anyways the old flywheel was too big. I went and got a new...
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    New engine place says special IGN sys on OMC???

    I am supposed to pick up my new engine Friday and called the place to make sure it would be ready today. The cs guy said that after speaking to one of the mech he said that the OMCs use a different ignition system that does something when you shift into gear. I forget what he said but I...
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    Parts needed to remove and install Cobra outdrive?

    I will be removing and installing my oudrive which is a 1988 OMC Cobra. I will be installing a new engine which is why I am removing it so I can align the engine. I have the actual manual for the outdrive. There is only one place locally that I can get the parts from but they are kinda...
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    Reset hour gauge after install new engine?

    I will be installing a new engine this coming weekend and was wondering if there is a way to reset the hour gauge? Do I have to buy a new one? Its an older 89 style engine so I dont think it has an ECM or anything like that. Thanks
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    Can someone help me see which OMC outdrive I have?

    Does anyone know if this is a Cobra outdrive or a king cobra outdrive? What is the difference between the two? The info off of the drives plate is: Model # 985271 Serial # T0566515
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    What is this? Foil, fin? Is it the right one? Take it off?

    I've saw these before. I assume they help you get on plane faster and maybe get some more speed. But this one looks old and maybe too small. The drive is an OMC Cobra connected to a 5.7 OMC engine on a 25' Donzi. Should I take this off? Get a new one? Is this the right one for this drive...
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    OMC Cobra Trim stop/interupt???

    I have an OMC Cobra outdrive and have been reading on here about problems with the gauge and trim. I can understand not needing the gauge. My gauge doesn't work. When the IGN is off is is all the way down (the gauge), when I turn the key on the gauge goes to all the way up no matter where the...
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    Decisions.... Remanned engine or rebuild what I got?

    Well I have figured out that my 5.7 OMC is gonna need gone through and at the least new heads, crank turned, new oil pan, new gaskets and who knows what else. I found a remanned engine from a place online that is about 2 hours away from me for 3K. My friend that works on boats said he will...
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    BIG problem. Bad oil leak, lost oil pressure, died, now tapping sound.

    Well I noticed there was oil in the bilge but when I pumped it out into a bucket it was about a half a quart. I went out Friday and checked the oil before and after and it was normal. Then before I went out yes I checked it and it was good too. Then I went out for a couple hours yes and about...
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    New to me 25ft with 350 big block and OMC Cobra outdrive!?!?!?!?!

    Hi all, I just bought a 25ft Donzi with a 350 big block and OMC Cobra out drive. The guy I bought it from had his original engine lock up on him, and the outdrive needed an overhaul. So he bought a remanned long block and found a better deal on a refurbed outdrive than the marina he was...
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