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  1. J

    1981 mercruiser 454

    Hey all... Names jef. Been a lurker around here for awhile.... ... Saying hello.... I have an interesting issue. The boat will only run with the button in The start position. With the starter still engaged. Here's the thing. With the button In the run position, I have power at the switch and I...
  2. J

    merc 340 to 4.3 v6

    Ok, just picked up a fiberform 2850, 1978. Has a bb merc (454) with a vdrive setup. I got the boat for nothing. I was told the motor was running great, but then sat, for two years. We'll when I pulled the dipstick it definitely had water in it. I'm wondering if it's even worth draining the oil...
  3. J

    twin mercruiser 340 not pulling gas from the tanks

    Ok so I have a 1985 chris craft commander 333 with twin mercruiser 340 inboards. Its been sitting for two years. The gas tanks were cleaned and drained when the boat was laid up . Basically the system is this. The lines come off the tank into eachother, and up to the water seperator, then the...
  4. J

    1985 merc 340 not starting. backfires through carb

    Hey guys. Have a 1985 cris craft commander 333 flybridge with two 454 mercs. They are fwc. I am having ignition problems (I think). The boat has been layed up for two years. It wants to start, but lets out a puff of smoke from the flame arrestor. I tested voltage at the coil, I have 11.6. I know...
  5. J

    stupid question im sure...please help

    Hi guys. I recently acquired a 1985 chris craft 333 commander. I love the boat, however have never owned anything this big. It has twin merc 340s. I just replaced manifolds and risers and did a full tune up on both engines, they run great. Im getting the boat ready to besplashed. Here Iis my...
  6. J

    merc 470, still having issues

    Howdy I have a 1980 merc 470. I know its an art form to try and get these things to run properly, so here goes. Just got a hold of this boat (1980 baretta cuddy cabin) and was told the motor runs good. Ok well, I figured it wasnt gonna fire right up, but I tried anyway. Well it needed a...
  7. J

    90 3.0 to 89 3.0

    Howdy, i have a 1990 larson all american with the merc 3.0/alpha 1 combo. Well my brother in law used the boat last weekend snapped the belt claims he didnt know iit snapped and needless to say it overheated and the boat came back with a cracked block. I got a great deal on an 89. Im a...
  8. J

    bolt sizes merc 90' merc 3.0 anyone help?

    Im changing my water circulating pump, but i have to grab my tools beforehand from a different location than where the boat is....40 miles away. Can someone tell me what size the pulley bolts are and the ones that hold it to the block? Also the alternator adjustment bolt so i can tighten the...
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