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    "Cutlass" Bearings: Johnson Duramax vs Morse Rubber ?

    I will be replacing both sleeve bearings on my boat. In my search for replacements, I came across these two brands, both of which are manufactured in the USA. There is a significant difference in price between the two. I'm looking for first hand knowledge as to the quality of the Morse Rubber...
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    Mercruiser Warm Riser vs Cold Riser Configuration?

    2003 Mercruiser 6.2L MPI Horizon MIE. I will be replacing the manifolds, 3" risers, and elbows over the winter. The engine is currently in the cold riser configuration. The obvious benefit of going with the warm riser is the risers should last much longer with coolant running through them vs...
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    Mercruiser 6.2L Closed Cooling Check Valve Question

    I have twin Mercruiser 6.2L MPI MIE Horizon engines. The older 2003 engine has the Cool Fuel 2 and the check valve between the transmission cooler and high pressure fuel pump module cooler The newer 2007 engine has the Cool Fuel 3. and does not have a check valve. Just curious to know what the...
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    What is the Purpose of Check valve Between Trans Cooler and Cool Fuel 2 Module?

    I have twin 6.2L MPI Horizon MIE engines. The older 2003 engine has the Cool Fuel 2 and the check valve between the transmission cooler and fuel pump module. The newer 2007 engine has the Cool Fuel 3. and does not have a check valve. Just curious to know what the purpose of the check valve is...
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    6.2L MPI Horizon MIE: New Long Block. Runs rough above 2000 RPM Under Load

    I had a 383 long block built over the winter by a reputable shop. The engine ran on the dyno for about an hour with a carburetor and ran great. The MPI intake manifold and TB was then installed, and my distributor set to #1 with #1 cylinder tdc. by the engine builder. I completed the assembly...
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    6.2L Mercruiser MIE: Close Cooled Dry Joint Exhaust. Convert From Cold to Warm Riser?

    I will be replacing the exhaust manifolds, risers and elbows. The old parts were also dry joint style. When I removed the parts I noticed that the system was installed as a cold riser setup. From what I have read, the warm riser setup will help minimize moisture forming in the exhaust so I see...
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    6.2L Mercruiser MIE: Drive Plate Mounting

    The parts diagram shows lock washers under the mounting bolts but the bolts I removed had no lock washers, just the reddish thread locker patch on the bolts. Should I just use Loctite 242 or Loctite 242 and lock washers?
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    MX 6.2L MPI Horizon MIE: Rebuild Recommendations Needed

    This thread is a continuation of my previous thread where I had the oil analyzed and it had antifreeze and high metal levels in the oil. I want to have a boat I can depend on next season so I think the best course of action for me is to either purchase a new GM long block or have one built...
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    6.2L MPI Horizon MIE Oil Analysis Shows Antifreeze

    Changed the oil in preparation for winter storage and sent oil samples out for analysis. The report for one engine came back with with high levels of the elements found in antifreeze along with wear metals elevated. Roughly 50 hours on the oil and 650 on the engine. Engine seems to be running...
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    Looking For Charles C-Charger Manual. 3 Bank Charger With 5 LED Charge Indicators

    Unfortunately the label with the model information was ripped off. It is original to the boat, which is a 2003. I looked for a picture of this charger in hopes of finding the model number but did not see one like this. Batteries 1 and 2 both have the red LED lit and the green LED lit. I can...
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    Rust Treatments

    In the spring, I need to get after some rust spots on the engines and transmissions. I read a thread where Scott Danforth no longer recommends the POR15 because the formula changed and it no longer works well. He did recommend the Rustoleum Rust Reformer which is relatively inexpensive and...
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    Looking For Feedback On Gore 100% GFO Packing

    The propeller shaft stuffing boxes are in need of new packing on a boat I recently purchased. I was wondering if anyone has been using the Gore GFO packing material that is manufactured by one of there approved weavers with the 100% GFO fiber (Same company that makes Gortex). This packing is...
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    ZF 63A Transmission fluid and filter change.

    I'm not sure this is the correct forum to post this, but it is what is bolted to my Mercruiser 6.2L Engines. No problems with the transmissions but apparently the fluid and filters have not been changed in at least 4 years. I will be doing this in the spring. Most of the fluids listed on the ZF...
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    2003 and 2006 6.2L Horizon Fuel Filters

    New boat for me. One engine has the cool fuel III module while the older engine has the older style fuel cooler with the spin on filter. In addition to those fuel filters there are two small inline filters, Mercruiser part number 35-864572. They do not appear to be part of the original...
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    Flush Raw Water System After Use

    I'm new to the inboard powered boats. I always had outboards. I have twin 6.2L Mercruiser Horizons with closed cooling, 2003, and 2006, salt water use. I realize there are flushing ports on the engines but they are not convenient to use. I would like to be able to easily flush the raw water...
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    Voltage Regulator 35 Amp Alternator 1988 V6 225. No Purple Wire

    The voltage regulator I am replacing has a purple wire, but the 586272 regulator that I have to replace it does not. That part number crosses to 583689 or Sierra 18-5832 The new regulator was out of the box and didn't come with any instructions. I just want to confirm that the purple wire on...
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    1888 225 V6 Looper VRO No OIl Horn, OIl Level Droppng, Tach Signal Bad?

    Newly rebuilt engine (by me). I couldn't run the engine on the stand long enough for the warning horn to sound. I am running an aux. tank with extra oil to prevent damage. Put it in the water and the VRO warning horn goes off after a few minutes and increases in frequency as the RPMS increase...
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    Bonding Wire Mounting Locations?? 1988 225 TXCC and 1991 200CXEI

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    Where can I find GM OEM engine build specs. Specifically Compression Specs.

    1997 GM 454 TBI engine supplied to Crusader 320 HP. What I'm looking for is an official document stating what the min max compression readings and acceptable cylinder to cylinder variation can be for the engine to pass inspection and leave the factory. I know. GM doesn't make 454's anymore but...
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    1997 Crusader 454: Need component locations for compression testing

    I am looking at a '97 Stamas 290 with single 454 throttle body injected Crusader. The engine is a Jasper remanufactured engine with about 50 hours on it. The engine has not been started in about 18 months. As part of my due diligence I drained the oil, did the prelube procedure using an...
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