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  1. Century Arabian

    Erratic timing and Vacuum

    Tank, The vacuum brake is on the Quadrajet Carb, When the engine is making vacuum, the brake prevents the secondaies from opening, once you go WOT, the engine does not create enough vacuum, and the brake releases. That's my understanding anyway. Sorry if I confused you on that point. Clyde
  2. Century Arabian

    Erratic timing and Vacuum

    Did some investigating this morning. I pulled the plugs and tested the compression test on all cylinders: Findings: # 1 cylinder, the center electrode was missing in the plug and there was no compression on that cylinder. # 6 cylinder, the center electrode was missing in the plug and there was...
  3. Century Arabian

    Erratic timing and Vacuum

    I had the engine rebuilt at a local well respected machine shop, they do a lot of work on Mercruiser motors
  4. Century Arabian

    Erratic timing and Vacuum

    Hey guys Earlier this summer I installed a freshly rebuilt 350 in my 21 foot bow rider. I had a little trouble with a surge at around 1200 RPM. I replaced the distributor cap, wires and rotor button and the plugs. This did not solve the problem. More troubleshooting revealed a broken vacuum...
  5. Century Arabian

    Ring Gear 1995 Mercruiser 5.0 LX

    I am looking at replacing the ring gear on the 5.0 LX. I checked the parts catalogue online, but the only listing is for the whole flywheel with the ring gear already installed. When I do an onlibe search, Sierra has a ring gear listed for a 14-1/8 flywheel, PN: 18-4516. Would anyone know if...
  6. Century Arabian

    Considerations for engine swap

    Hey guys, new to the forum but have posted here before. I recently had issues with my '96 5.0 XL back firing through the carb, traced it back to a seized #6 exhaust valve caused by a leaking riser/manifold gasket. Anyway, got word back from the machine shop today, mu heads are not reusable. The...
  7. Century Arabian

    1996 mercruiser backfire through carb.

    Well, I found the source of my backfire, sometimes it's the simple things, and sometimes it's not. This time it'd not. guess I had a bad cylinder head gasket as well as a bad upper manifold gasket, combined I ended up with salt water in the #6 exhaust port and on the # 6 cylinder seizing the...
  8. Century Arabian

    1996 mercruiser backfire through carb.

    Hey guys, I am new to this forum so bare with me. I have owned this boat for four years with no issues. It's a 1996 Century Arabian 21 with a 5.0 ltr. mercruiser. Last season I started to hear a little whine when I would turn the wheel pass center and sometimes the starter would make a little...
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