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Recent content by deerislandbrew

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    92' 7.4L 454 starter noise issues.

    I discovered a water leak in the manifold system. All manifolds and risers replaced. Engine runs at idle ok after warm up but backfires and runs rough when throttling. Timings ok. New rotor, plug wires, cap, plugs. Tested with a portable 93 clear gas tank. No change. Must be the carburetor.
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    92' mercruiser 7.4L 454 magnum I/O

    I pulled the riser elbows and 3" spacers off so far. Waiting on help and parts to do the manifolds. I noticed right away that the shop who installed my rises did NOT use a blocking plate between the risers and manifold, nor the two gaskets that are normally used. Just one gasket was there to...
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    92' mercruiser 7.4L 454 magnum I/O

    My question is: what typically wears first. Risers and elbow or exhaust manifolds? I have a closed fwc system. A bit of water is getting by and into the cylinders. Manifolds are sierras and 8 years old. Risers are 12 years old. I'm thinking to replace them all.
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    92' 7.4L 454 starter noise issues.

    At first I thought my starter was bad. I replaced it. What a crap job. Anyway, same issue. When cranking the engine it turns over, then there is a clanking, screech clunk sound. I let it rest. Try again. It turns over, then clank, screech. Maybe it's the flywheel gear, or alignment to the...
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