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idle

  1. GN7 On the Dyno
    Just ran the new engine, 476 fuller roller with dual plane and 830 Holley. Anything above idle it has instant response. But if I poke the throttle right off idle it hesitates and popped through the carb 3 times over a 3 day period. I checked the accelerator pump to make sure it was pumping as...
  2. Jet Boats
    BBC with a JF pump and at idle it will go dry. This is the only jet I have been aound so is this common or is there something I can do to fix the problem?
  3. Bob Teague
    Hello! I have a 427 in my Sanger Hydro with a tunnel ram and two new 600 Holleys. Runs great but have a problem with the motor idling. Haven't played with the carburetors at all except to make sure float bowls are full. Checked for vacuum leaks and none. I have to play with accelerator peddle in...
  4. Outdrives
    Ok, here goes. I have my 466 that I rebuilt installed and it runs great, turns a 23 5100 rpm at 5000 feet altitude. I am running an isky cam on a 114 lobe center installed about 5 advanced, compression is 9.8 timing total is 32. I am having trouble finding a happy idle in neutral that will...
  5. PB Open Water
    Hi guys, My brother has a 1999 28' nordic with a 496 efi engine. When you start it up hot or cold it runs rough but, as soon as you give it some throttle it seems to clear up and run fine. He took it to a shop in Havasu for outdrive service and after servicing it he told him that it sounded...
  6. Outdrives
    Hello, My apology if this questions has been asked many times. I did a search but could not locate an answer. As the title indicates, my 2006 496 HO starts then stalls. I called for service. I was told they had to replace both fuel pumps (Low & high pressure). They contacted me said the boat is...
  7. GN7 On the Dyno
    I went to the lake this weekend and came home with a problem that didn't exist last trip. My boat wont idle under load. 18' jet with 468. Running 2 x 600 cfm holley vacuum secondary. It idles fine on the trailer, put it in the water and it will die. I turned up the idle set screws but to keep it...
  8. GN7 On the Dyno
    hello anyone know what at idle in gear rpm I should be running for twin 454 magnum engines with moderate 540 lift hydraulic flat tappet cams? I've keep it around a thousand rpm's cuz the motors are brand new so to make sure the cams are getting plenty of oil while idling out of the fairly long 5...
  9. GN7 On the Dyno
    Dual 450'S (I know)..I can't get them to idle down. If I set the curb idle while running on the water I can get it to idle fine. But when I get on the throttle for a short time and them let off it wants to idle high. When I set the idle too low so it almost wants to die and then get on the...
  10. Greg Shoemaker
    Hey Greg...I just bought that black Eliminator sprint from Mouzer over the weekend. He was saying that you did the work on the boat about 8 years ago. I love the boat. Always wanted a Sprint. Maybe you can help me out a bit. He just had those two Holley 750's built and put on the boat. He...
  11. Jet Boats
    I just bought a Berkeley pump jet boat at idle it makes a growling sound my father in law tells me this is normal and his boat did the same thing should I pull the pump?
  12. GN7 On the Dyno
    I have a Mercury 6.2L that I am having some challenges with lately. I have replaced the ignition assembly, plugs, fuel filter wires and IAC on it. It runs really well when it is cold and even for a long while when warm. But after a good hour of running, it will start to drop RPMs. While cruising...
  13. GN7 On the Dyno
    What causes the motor to "surge" like a blown motor when it's first started and then after it's is rev'd??? It surges between 900 and 1200 RPM's then smooths out and ends up at 1200 RPM .... until I rev it again ..... :notsure: :dunno:
  14. GN7 On the Dyno
    It there any way to reduce the rpm difference between running in neutral and in gear? The cam i have calls for a 5k stall and 4.88 with 454-502 and i have 427 and 40's.In neutral the throttle plates On the trailer it will idle @ 1000, throttle plates show the transfer slot as square, idle mix...
  15. GN7 On the Dyno
    Old School "Gale Banks" twin turbo set up. After cruise, returning to idle the RPM's stick about 2000 rpm's. Shut the engine off and re-start, the idle returns to normal. No hard re-start, quick fire-up. This doesn't happen all the time but can be dangerous. Doe's anybody have any thoughts to...
  16. Jet Boats
    Been running the boat now for about a month with the new valves. Runs great. Right after I put on the new heads at the same time I installed my Vertex mag that I had sent out and repaired to a quality place. The mag went bad about 5 years ago and I have been running a stock GM dist. The timing...
  17. GN7 On the Dyno
    I've been trying to get this bog out for a few years. I've done everything to the Holley Dom that can be done short of reworking the internal fuel curve. I replaced it with a QFX carb and it helped some but it's still there. So I'm now looking outside the carb. This motor is a 468 with 12.5...
  18. V-Drives
    468 bbc, solid roller, 2 600 hollies with proform bodies. Set total timing to 36, runs great but idle at 2k, idle speed screws all the way out and no linkage problems. Set timing down to about 30, idle ok but power loss. Have not played with idle mixture yet, will adjusting the mixture help to...
  19. Outboards
    What should a force 120hp 2stroke idle at .Mine is around 750 and it seems low. Im new to the outboard game so thanks for any info.
  20. PB Open Water
    Need help in locating the Idle Air Control Valve on a 496HO. Thanks in advance.
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