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  1. Scott06

    Bellows replacement

    Does seem odd but may be influenced by water quality. I believe in salt or brackish they don't last as long. How were yours torn? My situation being in a shallow cove (drive almost all the way up to get in) and storing on a trailer with the drive up during winter layup puts more strain. The...
  2. Scott06

    Carter P4389 Doesn't Work when Connected to Carburetor

    Needle and seat in carb is stuck closed or pump is bad. Have you hooked up a pressure gauge to see if it makes pressure vs just pumping into a container ?
  3. Scott06

    Bellows replacement

    Would think a grand plus of minus a few hundred depending on where u are . Saw you comments In other post On lifespan.… use OEM parts in fresh water my u joint bellows were just starting to crack after 18 years . boat will sink if they leak and it is slip kept…
  4. Scott06

    Have spark and fuel, can't get the rebuilt engine to start

    Normally onky seen when timing cover is off. Google degreeing camshaft you likely can tell off the intake centerline. have you run a compression test? See if any cylinders may have valves set too tight. Id do this and verify timing again before taking engine apart. also had a engine with...
  5. Scott06

    Is my gimbal bearing sealed or greaseable

    Plain dot denotes greaseable bearing So someone Installed it wrong. see photos form 2009 merc service bulletin I would use it till it makes noise then replace
  6. Scott06

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    Forgot it’s a twin good point
  7. Scott06

    mercruiser 4.3 thermostat housing

    yes that hole but I think AD meant do not use so much sealer on the end wall gaskets for the intake that it gets down in the hole for oil pressure switch. Some folks just use RTV sealant on ends and it can squeeze down in the oil passage.
  8. Scott06

    2002 5,7 Mercruiser exhaust manifold keeps cracking - 5 times this summer

    Is there the possibility of reversion , not sure how this would cause cracks but just spitballing as this seems to have everyone stumped
  9. Scott06

    Commander classic shifter issues

    trim gauge is separate from the trim limit. port side is the limit switch which is wired to the trim pump harness. The trim gauge has a sender on the starboard side that sends an ohm signal up through the engine harness to the dash. these two are best replaced while doing a bellows job...
  10. Scott06

    mercruiser 4.3 thermostat housing

    as stated the difference between vortec and non vortec is the heads and intake manifold with the 8 vertical intake bolts. If you can find the heads worth the effort if you are rebuilding the engine. the balance shaft came out maybe in 1992 and is not connected to the vortec head. lots of...
  11. Scott06

    Commander classic shifter issues

    just take note that with the trim limit jumpered you can over trim the drive when at speed. You are not supposed to go into trailer range unless you are no more than a fast idle speed. Usually the ujoints will start letting you know ....
  12. Scott06

    Trim Limit setting. 20deg?

    Re the trim gauge having grown up with boats that didn’t have them or current boats were non functional or inaccurate I wouldn’t waste the time to install it. You end up trimming based on load number of people and how smooth the water is so no gain in my opinion
  13. Scott06

    mercruiser 4.3 thermostat housing

    The non vortec and true vortec heads the intake and exhaust ports and combustion chambers are designed for better airflow and make more power. The easier way to tell is the intake manifold bolt pattern.vortec heads use 8 vertical head bolts instead of 12 angled into the cylinder heads. Ona 4.3...
  14. Scott06

    Dashpot on quadrajet (merc 488)

    I think you are right. I did some additional reading on it on some GM forums and one mentioned that it keeps the air valve from slamming open when you nail the throttle and also cracks the choke open a hair when you start, otherwise choke would be too far closed. like you I like making it work...
  15. Scott06

    Dashpot on quadrajet (merc 488)

    that to me looks like a choke pull off. I am not intimately familiar with Q-jets - maybe @kenny nunez is ? I'm spit balling here- it looks like the small flat rod (2 holes in it) coming out of the pull off attaches to the perpendicular rod behind the choke stove housing. the other hole in it...
  16. Scott06

    Dashpot on quadrajet (merc 488)

    I was just gonna edit my post as I think GM used dashpots on the throttle side - can you post a picture of what you are working with? if you have a dashpot on the throttle lever I think that would indicate someone put an automotive carb on your engine. Fuel and electrical components are two...
  17. Scott06

    Dashpot on quadrajet (merc 488)

    normally that is for the choke pull off, basically to use engine vacuum to open the choke. I suspect as long as the vacuum port is connected you can wire the choke open and run without it although you may have cold start or warm up issues. I ran my mercarb without a working choke for years in...
  18. Scott06

    Commander classic shifter issues

    Trim up not working and having to use trailer to trim up is probably the trim limit switch on outdrive not working. You can jumper it out at the transom and see if trim works.
  19. Scott06

    Mercruiser bearing carrier tool

    Title says bearing carrier assume from drive gear case OP also posted on marine engine forum same question I mentioned same thing need to move pivot and hold the fingers say they stay forced out
  20. Scott06

    mercruiser 4.3 thermostat housing

    Both designs water flow through the manifold. warm manifold with separate feed to risers. Water only is supplied to manifold when thermostat is open, cold manifold gets flow all the time. in the end I think either design works. Thought was for less condensation with warm manifold. I have had...
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