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    How do these spark plugs look?

    Sorry if for the blurryness but it was a PITA to try to get my Iphone 4's camera to focus on the plug. How do these look? What is the preferred plug for the 5.7 OMC engine? These are what came in the engine when I bought it. They are Autolite 25. As always, thanks
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    First time dist tune up and carb questions

    As per my earlier thread I decided to do a tune up on my Prestolite points style dist. I am trying to fix some issues on a new engine I have. It has 22 hours on it right now. It will run good then it will start backfiring and bogging at anything over 2K RPM. I have had a problem even when it...
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    ? about dwell and points

    I have been reading up on how to do a tune up on a points dist. I have a ? though. It says: As point gap increases dwell decreases As point gap decreases dwell increases But isnt the point gap supposed to be set exactly to what the manual says? So if I set the gap to what my manual says...
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    Dist advance?

    I have an old prestolite dist that's installed right now in my 5.7 OMC. I have an HEI electronic dist with a 50K coil. I was gonna install it but for one it's not a marine one and two it's too big to fit. Anyways the HEI one has a vacuum advance thing on the side of it. Pretty sure it gets...
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    What is / where is anti siphon valve?

    I'm just about done pumping all of the gas / water out of my tank. I took the pick up tube and valve off the tank. The tube that sucks the gas up and the valve that you can shut off the fuel supply. I looked in there and it looks good. No debris or gunk. I also see two hoses coming out of...
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    People always almost kill me on the water. Couple tales

    I have always seemed to have bad experiences on boats when other people are involved. Im fine by myself but other people seem to get me into dangerous situations. Here are some. When I was 15 (Im 26 now) my uncle would take me out all the time on his 21 ft bayliner. One time we ran over a...
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    old points type IGN. Coil getting too hot too touch. Wires too small?

    I have a Prestolyte points style dist and an Accell coil. Yes while out on the water I felt the coil and it was too hot too touch. There are 2 spots where wires are connected to the coil. One of the sets of wires is fine but the other side was very soft and hotter than hell. Heres a pic...
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    Does this points dist look good or bad?

    This is the dist on my 5.7 OMC. Its the Prestolite kind. How does this thing look? Does it need points and tune up and all that stuff? Last ones kinda blurry sorry. http://i904.photobucket.com/albums/ac243/JBOAT1/9cc75ee7.jpg http://i904.photobucket.com/albums/ac243/JBOAT1/65a1e1e9.jpg
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    Mysterious water found it fuel? Might be so happy its there!

    Well I have been having some problems with my boat and the other day with a POS mechanic trying to scam me. you can read about the mechanic here http://forums.iboats.com/showthread.php?p=2850615#post2850615 Basically I had a mechanic straight up try to rob me the other day when I brought my...
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    What exactly is needed for electronic IGN conversion for 89 5.7 OMC?

    I am going to be converting my 5.7 OMC engine to electronic IGN. I know I need a new ESA module that is compatible with electronic IGN, and a new distributor and coil. Is it correct that if I get the new ESA module that is compatible with electronic IGN that I dont have to do the resistor box...
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    connection came loose above oil filter engine cut off wont go over 3K RPM backfires

    Sorry about the long post but I got a lot of info. Any of you who saw my earlier thread about my oil filter mess know what a PITA it was. I had knocked a wire off of the thing above the oil filter which I thought was the oil pressure sender or something. It had 3 or 4 (forget) wires...
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    If gearing in outdrive is wrong will upping prop pitch still drop WOT RPM?

    Hi all, I have a 25 ft Donzi with a new 350 and Cobra outdrve. Long story short the guy I bought it from had replaced the outdrive with a used one he bought from someone. I looked up the info on this drive from the info on the tag on it. Model 985271 Engine 5.0 Serial T0566515 In my manual...
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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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