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    Twin Merc. 6.2 Mags with Bravo 3 - EMCT Temperature Overheat Fault - Port side Manifolds (Only)

    You should have PMed me. I removed my cats years ago since the post O2 sensors kept failing after about a year (max volt cat simulator). You post cat O2 sensors are bad (obvious in picture), Wagner makes a replacement for the quicksilver/mercuriser O2 for about 60% of the price $55. When you...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    I have a 5.0 mpi seawater (salt water) cooled catalyst engine. 260 hours. Of the 260 hours 259 are in 100% salt water and 1 hour in brackish. I also have a Rinda which shows the misfires on 3. #3 spark plug wire was removed, terminal inspected, ensured wire snap on when reinstalled. (I had...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    Mine is catalyst motor. That why changing the distributor cap took 1 hour vs 15 minutes. That said my catalyst are in my attic. I have a cat simulator that prevents codes from being set. Yea I got tired of replacing oxygen sensors every year. Also removing the catalyst completely eliminated...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    So far I spent $115 for distributor cap and rotor and $15 for fuel filter with zero to show for it. I don't feel good about feel good maintenance. Truth be told the $1700 on manifolds were a waste of $$. Long story on another post but in the end there wasn't any corrosion which could...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    Thanks!!!!!!!!!!!!!!!!!!!!!!! for the TSB. Mine has 260 hours so I am kinda past the window but making the "tool" and doing the test can't hurt. I do have two flag type breakers. When doing the cap I must have bumped the one by the PCM boat wouldn't start, so I reset it when I found the...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    I like the idea of swapping the leads and plugs, but I ordered 8 plugs so I will install those. I should have realized if it was the distributor cap it would probably have caused misfires on more than one cylinder. One unique characteristic is no misfires for a minute or two then misfires...
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    Mercruiser 5.0 MPI #3 cylinder ignition miss

    I changed the distributor cap and rotor with Quicksilver yesterday. The one on the engine was original 2011 with 260 hours, I am 100% sure. A lot of white corrosion on terminals. No difference in misfires, lol. Still #3 getting about 15 misses a minute at idle. I will go after plugs next...
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    Best wrench to remove 5.0 water separator filter

    A buddy at work races cars, pretty competitive. I asked him why oil filters get so tight. His repsonse, I have no clue but in a 1/4 mile run they seize is if they been on there for 5 years. My guess the o-ring swells to aid in sealing. Again, I found zero water in mine, a buddy whose boat...
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    Mechanic needed

    I agree you need to find a mechanic that will throw in o2 sensor in exhaust and get it jetted with correct power valve based on actual fuel /air mixture. On a side note on engine masters they showed how to tune a Holley carburetor. May be on YouTube. Very interesting and not difficult after...
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    Best wrench to remove 5.0 water separator filter

    I have a searay 205 and panel right in way. What a MFer. After jacking around for 45 minutes I removed the panel, squeezed my but in there and used a pipe wrench. I bent the bracket the fuel filter mounts on removing but it came off, I sure didn't put it on that tight. I never replace...
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    Maintenance intervals

    Classic example I removed my outdrive, checked alignment, gimbal bearing, just snooping around. Put back together, all well, Year later I see outdrive gasket between gimbal and outdrive squirmed out. That turned into 3 attempts before I found one (after many post on this forum by a moderator...
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    Maintenance intervals

    Replace bellows every 5 years, I agree if stored in water 365 days a year. Mercruiser shift cables are teflon coated. They will last indefinitely. Aftermarket no. You change your bellows and don't get all the clamps aligned you will destroy them in short order. You buying an exhaust bellows...
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    Why is my carb oxidizing????

    Your block gets very cold over the long winter especially at night, then a warm front comes in then cold. Your engine is like a cold coke on a picnic table in summer sweating. I stored a boat outside one summer with a cover in Houston. Every single day you would think someone washed the...
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    Trim Ram End Cap Replacement

    the end caps usually go bad when the boat is used in salt water. The salt collects behind the end cap seal and o-ring. the salt eventually causes the outer seal to expand and swell causing excessive friction on the trim cylinder rod. usually squeaking is heard. That being said when I...
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    Maintenance intervals

    Where is your boat stored? Inside storage, in water, outside. If stored inside or enclosed storage and only in water when used your bellows probably good. Mine were after 30 years. Shift cables don't wear out, especially the Mercruiser ones. They fail due to water penetration. Gear lube...
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    Engine Replacement Compatibility

    It may sound fun to have excessive power but an unstable boat at high speeds (above 55) sucks, its not like playing in the ice with a car wihere you can kind of control the amount slide. On the flip side an underpowered boat sucks also just safer.
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    5.0gi to 5.7 swap

    I am curious if an engine is running lean do you always hear "pinging"? Is it possible you hear or feel nothing an still run lean?
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    HELP!! 2001 Volvo Penta SX running hot

    To bring closure. The aftermarket MSD distributor had to soft of springs which advanced the timing to far causing the overheating. Adjusted timing based on full advance, didn't care what base timing was and no more overheating at higher rpm's.
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    4.3 Carb v 4.3MPI

    Can we agree the MPI has better drivability than a carburetor? Can we agree the MPI has the potential for more complex and expensive problems.
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    4.3 Carb v 4.3MPI

    Vapor lock occurred every day for 30 years when I used it. Ran boat, shut boat off, drank for hour, tried to start vapor locked. 3.0 liter. Had the phenolic gasket between carb and manifold. In end I either pushed throttle all the way open after I shut engine off and let excess gas evaporate...
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