Question about Light Outboard Motor Boat Bass Fishing Saltwater Base

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My mercury 35 hp outboard motor idle's fine but won't run

Hard to crank but idle's fine but when you gear down it choke's down. It run's fine at home with the water hose, both idling and gearing down. Once we take it to the river it wants to act up.

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Sounds like the carb. Could be restricted from fuel being left in carb. Too long without stabilizer

Posted on Jun 20, 2013

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I have a 1978 70 evinrude that will run in idle but will not run under load and will cut off if i accelerate

Posted on Apr 02, 2011

  • Mike Kolstad Jul 06, 2014

    My 50 Hp Merc did the same thing. I replaced all the fuel lines. It seems that air was leakining in to the lines. Easy cheap fix.

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While at the river try to adjust the fuel air mixture. When you are on the water it puts the engine under a load and if that dont work then dont be afraid to bump up the idle stop screw slightly.

Posted on Aug 06, 2009

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Posted on Jan 02, 2017

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I have a 2012 mercury 6hp four stroke that will not idle without the choke on


Hi, Lee and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
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Mercury Outboard Idle Adjustment
2010 6 hp Yamaha 4 stroke wont run with choke in Page 1 iboats Boating...
8m0055686r. google this for a free manual
Won Idle Here what did to fix it Yamaha Outboard Parts Forum

Apr 13, 2016 | Motorcycles

1 Answer

Starting proceedure for 72 evinrude outboard?


  • Check all connections , fuel, battery, etc
  • Squeeze primer bulb until firm
  • Lift choke switch , listen for operation (click)
  • Raise idle speed lever, not too much, be prepared to lower quickly if engine starts to over rev . (remember, this is a 1972, it does not have much for safeties.)
  • lift and HOLD choke switch
  • Turn key to crank
  • release choke when fires
  • if running, you may have to flip choke switch again until it warms up.
  • watch idle speed as 2 cycles can "run away"
  • Hope this helps
  • All of this assumes the motor is in the down position and IN THE WATER or hooked up to a flush device.
  • NEVER start the motor without water going to the gear case(water pump)

Feb 16, 2015 | Boating

2 Answers

Why wont my 50 hp mariner start ?


renew spark plugs,mix up some fresh fuel,put choke on,throttle set at just above idle,pump up fuel bulb by hand till tight,put outboard in a water drum,try pulling or turning on starter till it fires,then push choke in and restart

Jul 25, 2014 | Mercury Gear Set, Complete, Mariner, Force...

1 Answer

Have 115 Hp mercury outboard motor missing at full throttle and on idle. At mid throttle it is running fine. Any Idea what the problem could be. Thanks, Milton


Have your spark plugs changed AND carbs cleaned and adjusted.
Usually that can also be caused by a seized advance system ( plate under the flywheel, commanded to turn with the throttle linkage... )

Aug 16, 2013 | Seloc Mercury Outboard Repair Manual, 1965...

1 Answer

2007 Yamaha 115 Hp 2 stroke idle problem


Check the idle mixture. Sounds to me like it is too lean.

Mar 20, 2017 | Clymer EvinrudeJohnson Outboard Shop...

1 Answer

I have a 1993 2 stroke 40 hp mercury outboard motor and it seems that whenever you start it you need to use the choke, even when it's been running for some time and warm. Is that normal for these motors?...


Use it .It is a common thing with 2 strokes.Outboards have water in them and cool down quicker than say a 2 stroke motorbike. They have no water and keep the heat in the engine longer.If it runs well,,don't spend the money.All the choke does is gives the motor a slightly richer air/fuel mix at startup.It cannot hurt the motor.Hope this helps

Jan 05, 2010 | Boating

1 Answer

1993 40 HP 4 cyl. Mercury outboard: Running along


I solved it with no help from the professional assistant team. Thanks for no help till I send money...DON'T THINK SO!!! Thanks for wasting my time.

Sep 03, 2009 | Boating

1 Answer

3.5 mercury outboard stalls when put into forward


hi take the prop off see if there is anything /string/ between the hub and the housing check oil lvel in g/box /is gear box nice and free if all is ok try it in ware with just a small amount of choke
drain /empty fuel out replace with fresh /correct oil mix
check /change fuel filter/air filter
warm engine up check idle mixture ajustment/tick over speed
increase idle speed slightly/7/800 rpm
hope this helps merlin v 12

Aug 20, 2009 | Light Outboard Motor Boat Bass Fishing...

1 Answer

15 horse mercury outboard


Clogged jets in the carb...clean out carb or rebuild carb.

Jul 28, 2009 | Boating

1 Answer

Turn the switch off motor keeps running


It sounds like there is a short in the alternator or wiring for alternator. You are continuing running with the battery cut off. But the outboard generates its own power and its finding the way to the ignition. As for grounding, you may be idling too high for a quick shut off.

Jun 18, 2009 | Boating

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