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  1. Jacalore

    MerCruiser 3.0L 140 Electronic Ignition Grounding Question

    This (1985) engine stalls when pushed over 1500 rpm. Timing was off, adjusted to 6? BTDC at idle (700 rpm). Mix adj has little affect, idles a bit rough. Talking to PO, he installed a PerTronix Igniter electronic ignition system. Afterwards stalling problem began. He thought it was the carb, but...
  2. Jacalore

    MerCruiser 3.0L 140 No Acceleration

    Re: MerCruiser 3.0L 140 No Acceleration Ok, one problem solved - it's not a Sierra conversion... Found install instructions on PerTronix website. After install "set the timing in the conventional manner" So, I'm back to square one.
  3. Jacalore

    MerCruiser 3.0 Carb Idle Mix Adj

    Q: The carb mix screw has no effect after about 1-1/2 turns out. The rpms rise about 3-1/2 turns out... any further adj has no affect. Turning idle screw puts the idle back down around 650-700 rpm. Idles a little rough. This doen't seem right? Any help appreciated. Thanks
  4. Jacalore

    Timing Info Needed for '85 140

    Re: Timing Info Needed for '85 140 Ok, making progress! Checked the timing - it's reading TDC! So, this may be the cause of my problem. BUT, I can't get at the bolt underneath the distributor. Looks to be about 1/2" and access blocked from the top by the dist housing, blocked at other angle by...
  5. Jacalore

    Timing Info Needed for '85 140

    Want to check timing on my 1985 MerCruiser 3.0L 140 with electronic ignition conversion kit installed by PO. No paperwork. Any info appreciated. Thanks.
  6. Jacalore

    Trick To Removing Old Hose?

    Working thru an 8" inspection plate. Need to get a tool in on the fuel shutoff valve, but large fill hose in the way. Removed the hose clamps, pried with flathead screw driver and gently twisted with adj pliars. I don't want to destroy the fill hose, but I need it out of the way. Is there a...
  7. Jacalore

    Anti-Siphon Valve Location?

    '85 MerCruiser 3.0L 140 I'm having fuel flow problems. Where is the anti-siphon valve located? I opened up the inspection plate, and the fuel line out to the engine connection is rather nasty looking. Is the anti-siphon valve in that square with two philips head screws on top? Also, isn't the...
  8. Jacalore

    MerCruiser 3.0L 140 No Acceleration

    Problem: 1985 MerCruiser 3.0L 140 No Acceleration - dies above 1500 rpm Background: Bought boat with "carb" problem, prev owner said he rebuilt carb but didn't replace float, resulting in no acceleration. I attempted to rebuild carb, but threads on carb at fuel inlet stripped, so I replaced...
  9. Jacalore

    Instrument Cover for '85 Chris-Craft?

    Have a 1985 Chris-Craft Scorpion 169 missing instrument cover and passenger side glove box cover. From the original brochure it looks like they were L shaped plexi covers that hinged on the forward side. Anyone know of a source or suitable replacement? Thanks.
  10. Jacalore

    MerCruiser 140 Fuel Line Rigid or Flexible?

    I have a 1985 MerCruiser 3.0L 140hp 4cyl engine - has a flexible fuel line running from fuel pump to carb intake - is this correct? Safe? I saw another similar engine and on it, that run was all thru a rigid fuel line. Which is correct? Thanks.
  11. Jacalore

    Recommend a Hand Pump for Fuel/Oil Removal?

    I have an inboard gas tank I need to empty, can anyone recommend a hand pump or drill driven pump to do the job? Even better if it doubles for removing engine oil thru dipstick. Thanks.
  12. Jacalore

    How To Set the Idle Up on a Mercruiser

    Does this sound correct? How to Set the Idle Up on a Mercruiser Boat Engine | eHow
  13. Jacalore

    Can Gas Treatment Save Half Tank of Fuel?

    Boat has sat since last summer with half full tank of gas. The fuel filter looks like salad dressing. Can this fuel be saved with treatment, or does the tank need to be drained?
  14. Jacalore

    MerCruiser 140 Alternator heating Up

    '85 MerCruiser 3.0L 140 - the alternator seems to be getting hot. Is this normal? Shot a thermal gun at it, read 135? - seems a bit warm, no? How to test an alternator? Thanks.
  15. Jacalore

    Definitive Procedure to Adjust Elec Choke Merc 3.0 140

    I've read thirty different variations on this, can anyone vouch for the correct procedure to set up the electric choke on a MerCruiser 3.0L 140? I'm struggling getting mine set correctly. Thanks!
  16. Jacalore

    Best Way To Bring Up Faded Hull Color?

    Have an older hull, mostly white but with a broad red swipe from bow to stern that's faded, more so in some places than others. (Red must be the worst color to maintain in a sunny environment!). Is there a way to restore the luster? Or at least make it consistent? Any advice appreciated!
  17. Jacalore

    MerCarb 3.0L 140hp Stripped threads - Replacement?

    Have 1985 Chris-Craft Scorpion 169 with a Mercruiser 3.0L 140hp 4cyl... fuel connection has stripped threads on carb. Numbers on carb plate are 1389-8490 Can I order just the top or do I need the whole carb? Source? Thanks!
  18. Jacalore

    Most Efficient Cruising RPM?

    I looked around and didn't see this question anywhere else... What is the most efficient cruising rpm for a MerCruiser 3.0L 140 w/ Alpha 1? And what is redline (with correct prop) rpm? Thanks!
  19. Jacalore

    1985 Chris Craft Scorpion 169 Info Request

    Re: 1985 Chris Craft Scorpion 169 Info Request Mariners Museum sent me the 1985 Chris-Craft Scorpion 169 brochure... Here are the dimensions
  20. Jacalore

    1985 Chris Craft Scorpion 169 Info Request

    Looking for any and all info links Boat and engine. Thanks!
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