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JerryandDixie Kooienga Posted on Mar 01, 2018
Answered by a Fixya Expert

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1995 mercury 150 horse runs great idols great but very slow .when put in reverse quits seems like to slow idol . what screw do i turn for fast idol

1 Answer

fordexpert

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  • Mercury Master 5,692 Answers
  • Posted on Mar 09, 2018
fordexpert
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Joined: Apr 20, 2009
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Seems like your are describing a outboard motor. If so, the Boat section of Fixya may have more experts that you need. You would want to avoid turning any screws on the carburetor body. The externals on the linkage have some adjustments like throttle stops.

The linkage on boat shift mechanisms are tempermental. They usually combine 2 functions on 1 control lever. They are synchronized that when the transmission shifts from neutral to forward and neutral to reverse the idle speed is low. This keeps the gears from grinding and takes the shock out of the shifting process.

Another thing different than on a car engine is the effect of the propeller on engine rpm. You can change the "in gear"
rpm for both directions by changing prop size and/or pitch.
This also means you can over-rev the engine by having the wrong prop on the boat. There are engine rpm "stops" for the high end too, but some just rely on using the correct prop. As what you may be experiencing with a "stall" can be brought on by

A word of caution. The inboard/outboard engines can have the same problem as outboard engines. The shift levers are synchronized with a pivot system and adjusting the throttle can interfere with the shifting.

You may be able to view youtube videos by searching for these topics.

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jul 13, 2008

SOURCE: idol problems

the idle screw can be located by following the throttle cable to the carby body, you will find a quarter wheel which the cable hooks into at the bottom you'll see adjustment screw, this will adjust your idle speed.

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Anonymous

  • 1 Answer
  • Posted on Jan 30, 2009

SOURCE: 99 mercury cougar wont idol until car is warm p0420 codes came up

Hello, here is a thread I found on this site with from what it looks like, the same problem(with an added solution) that you have. http://www.fixya.com/cars/t1576683-1999_cougar_diagnostic_code_p0430_p0420

Anonymous

  • 512 Answers
  • Posted on Feb 22, 2009

SOURCE: hello. My 2001 PT cruiser with manual transmission

sounds like the automatic idle speed motor has gone bad and needs replaced

Anonymous

  • 1 Answer
  • Posted on Apr 22, 2009

SOURCE: timing chain tensioner

I have a '94 Altima with 2.4 liter 4 cyl. engine. At around 150K the timing chain and tensioner were replaced - should solve your problem, too. If you're sure the chain is rattling you should really get it serviced now, not later. Also, if your car is running rough it could be more than just the chain and tensioner; it could be your ignition system, such as plugs, coil, distributor, etc. Bottom line is, your car needs to be checked out right away.

Anonymous

  • 1986 Answers
  • Posted on Sep 15, 2009

SOURCE: My 04 Isuzu Axiom idols very low

I'd have the Idle Air Control Valve,the Throttle Position Sensor, Fuel Injectors, and Fuel Pressure Regulator looked at

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