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  1. S

    2005 5.7 MAG - No power to dash - Combo switch trips breaker

    Suddenly no electric power at helm / no start on port engine ignition. Stbd engine is fine. When I tried using the combination battery switch, the engine switch breaker in the cabin would trip and the starboard engine would also die. Reset the breaker and then the stbd engine will work...
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    2005 5.7 Mercruiser Horizon MPI sn OW061013

    2005 5.7 Mercruiser Horizon MPI sn OW061013 This is closed cooling ( heat exchanger) (dry joint?) This winter I had the yard replace the raw water intake hose I replaced the elbow gasket Quicksilver OEM MerCruiser 4.3/5.0/5.7/6.2 Dry Joint Closed Exhaust Elbow Gasket 27-864549A02 First ride...
  3. S

    Broken M25 Alt bracket stud

    Attached photo is courtesy of Mainesail webpage, not the exact engine. Just using to show the stud location The red circled bolt sheared off with the internal threaded part still in there. Don't ask how please. It is the new bracket style, so just the lower bolt is holding the bracket firm on...
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    2005 - 350 MAG MPI HORIZON - Elbow gasket sealant or no?

    Ive researched the hell out of this and have found no consensus. Cloosed cooling - Dry Joint Elbow gasket If sealant is uses on the metal gaskets it seems people say use Permatex Aviation ($12) or the Mercruiser sealant ($50) its basically the same. But many say latest info is to not use...
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    350 MAG MPI stalled. Will not restart

    My 2005 350 MAG MPI has been running perfectly. Suddenly while cruising speed she quickly bogged down and stalled. Will not restart. In the spring I changed cap and rotor. After stalling I replaced IAC and cool fuel filter just to try. No help. She sounds like she wants to fire up and start...
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    Idler pulley bushing

    I have to change the idler pulley, and the bushing that comes with it. Can I press the bushing in with simple tools? Or should I bring it to a shop and have it done? Its part # Quicksilver/Mercury Idler Adjustor Bushing 865193 Thanks!
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    Bravo 3 ram anode - stripped holes

    I cannot get the little 8mm bolts on the collar zinc to bite into the ram end cap holes. It seems stripped holes is a common problem There is no room to tap new threads without dissasembling the ram, or get a drill in straight to add a helicoil. Someone suggested using a 3/4 x 2 1/8 inch...
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    350 MAG MPI Distributor cap and rotor change - Mercury vs. Sierra

    Mercury OEM parts are hard to find and back ordered . Some of the reviews for Sierra on Amazon are pretty bad. But the dealer says he uses Sierra Dist Caps all the time and no problem What is the consensus? Sierra also much cheaper of course.
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    5.7 MAG 350 MPI HORIZON - No start oil pressure switch?

    I am in the process of trouble shooting and now on to the oil pressure switch. Can anyone advise the correct part number? Also, Is it the 3 wire switch as in the photo (pink/black, gray, blue) and if I jump it to test , which wires should be jumped? SN OW061000 Thanks
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