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How to adjust idle on a 2 stroke 40 hp mercury 2001 oil injected boat motor

Need to increase idle speed

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 677 Answers

SOURCE: 4 stroke 6hp mercury outboard -brand new first

????? Was the dealer using his fuel tank or yours.Might be a blockage or contaminate in the fuel tank.Hope this helps

Posted on Dec 03, 2009

extreme7528
  • 108 Answers

SOURCE: 1964 5 1/2 hp evinrude kills at high speed

You should have a High Speed carb adjust and a Low Speed carb adjust. If it's running fine while idling, adjust the high speed setting. If you have two nobs, its the lower one. May be set wrong. If you don't have two nobs, remove the carburator and check the jets to make sure they are completely clean or better yet, order yourself a carb rebuild kit to take care of all of this. I just rebuilt my 1971 evinrude 4hp and the carb kit made the world of difference.

Posted on May 14, 2010

budgie140
  • 501 Answers

SOURCE: Boat does not plane

you could try a lower pitched prop.2" would up the revs by 400 revs.,which would up the revs ,but give you more low down thrust,and/or tucking the motor under more[if you have electric trim/tilt].thats a big boat and fair bit of weight for a 40hp..my 40hp merc is on a 13ft saracen,and with two of us it takes a while to get gooing.so i bought a ProPulse prop,with adjustable pitch.been god to try different pitches

Posted on Jul 10, 2010

  • 107 Answers

SOURCE: Outboard Motor Boat Bass Fishing Saltwater Base: 1990 yamaha 15 hp oil mix ratio...

100 - 1

Posted on Jul 21, 2010

  • 7 Answers

SOURCE: How much 2 stroke oil do I need to add to 1 litre

40:1, means 40 parts petrol to 1 part oil. So it's (1 litre-1000ml) divided by 40= 25 ml of oil. Even if you had an odd amount of fuel, Say 7.5 litre's-7500ml 7500 divided by 40 = 187.5ml of oil.

Posted on Sep 07, 2010

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1 Answer

1998 1150412UD Mercury Outboard - is it 2 or 4 stroke


If it has an oil compartment, it has to be a two stroke. There is a rough and ready way to check. A four stroke engine has a compression stroke on every four strokes, whereas a two stroke has compression stroke on EVERY upward stroke of the piston. Remove the spark plugs, and turn the engine until you see the piston. Put your finger over the plug hole and turn the engine one revolution. Do you get compression? Keep turning, do you get suction and then compression again. If so it is a two stroke.

you can also follow the pipes from the oil tank and see where they go to? Yours should have a pipe from the pump to the carburetor inlet manifold.

On a new boat though, my advice for you is to take the boat and engine to a marine engineer for a service. The cost is minimal and you will get everything set up for the season, especially the carbs. You can ask lots of questions. The cost is about $150 and is well worth the piece of mind that you are not going to break down.

The critical bit you have missed from your post is the HP. If you Google

Mercury HP Serials

and you will end up at a site with engine details. Then google the same, but manual instead of serials. If you know the year of the boat, add that before 'Mercury'.

Use Evinrude XD50 two stroke oil. It is expensive but the best in clean running, non fouling and lack of acrid fumes. One $48 jug will last a season and a bit if you go out twice a week as I do. My boat goes to the marina on Wednesday :>)

Google

May 29, 2017 | Mercury Boating

1 Answer

WHATS THE FUEL AND OIL RATIO FOR 25HR 2CYL OUTBOARD MERCURY


need the year of manufacture as some 2 stroke units have oil injection that automatically mixes the oil in the correct ratio for engine rpms otherwise it is 50:1 ( 50 parts fuel to 1 part oil)
oil requirements --certified tc-w3 2 stroke outboard oil ---not ordinary engine oil
reference
google --type in mercury outboard oil to fuel ratio

May 07, 2017 | Mercury Boating

1 Answer

What year is a mercury 35hp outboard motor with serial number2491265.Is the motor 2 or 4 stroke


the serial number begins 2487558 and continues past 2491265 and as the beginning serial number denotes the year , your engine is 1969 model
it shows as a 2 stroke with auto oil injection
check the heads
if the plugs are in the flat of the head and there are no rocker covers it is 2 stroke
talk with a mercury /mariner service center

Sep 25, 2016 | Mercury Mariner Starter, Outboard, 35-40...

1 Answer

Do I use reg gas or a gas mix?


Matt, If engine is two stroke and not oil injected then yes you must mix 2 stroke oil and fuel. 4 stroke engine have a crank case which is filled to proper level with 4 stroke engine oil. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
How to Decide Between Two or Four Stroke Outboard Boat Engine

4 Stroke Outboard Motor vs 2 Stroke Outboards

2 stroke outboard Vrs 4 stroke outboard

http://www.cottagetips.com/tips/boat-motor-gas-to-oil-ratios

Apr 15, 2016 | Boating

1 Answer

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.
Boat Motor Won Stay Running Watch This
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

Water got into the engine oil of my 8 hp 4 stroke when on the boat only as troller


Water gets in your engine through the exhaust with the boat speed! Lift that engine when not in use!

Oct 16, 2014 | Mercury Marine 8hp & 9.9hp 4 Stroke...

1 Answer

I have a 1997 Yamaha 40hp....C40PLRV without oil injection. My Sealoc manual calls for a 100:1 fuel mix. I had a dealer tell me to run 50:1, but it idles rough and is hard starting when cold even with...


Mate.2 stroke motors WITH oil injection run between 100/1 and down to 40/1(rich).With yours being pre-mix,it should run at 50/1 to be safe.Using a good quality 2stroke oil,with low smoke,it should run well.The only thing that may change, is how you use the motor.Slow trolling or running along travelling.A spark plug that is 1 heat range hotter will help burn the fuel/oil mixture if you do a lot of slow running.Faster and /or high speed running,will keep your plugs ok.These are safe guides not to cook up a piston.Hope this helps you

Dec 06, 2010 | Boating

1 Answer

1964 5 1/2 hp evinrude kills at high speed


You should have a High Speed carb adjust and a Low Speed carb adjust. If it's running fine while idling, adjust the high speed setting. If you have two nobs, its the lower one. May be set wrong. If you don't have two nobs, remove the carburator and check the jets to make sure they are completely clean or better yet, order yourself a carb rebuild kit to take care of all of this. I just rebuilt my 1971 evinrude 4hp and the carb kit made the world of difference.

Apr 17, 2010 | Light Outboard Motor Boat Bass Fishing...

1 Answer

Changing oil in my 2001 mercury 40 hp 4 stroke outboard motor. Is there a drain plug or do i have to pump out the old oil ? What is the best oil to use? Don


You will have to drain it yourself, no big deal in doing so...the plug is under the front of the car, on the back side of the oil pan...now...go get dirty...heehe...take care.

Mar 27, 2010 | Boating

1 Answer

Can I place an in line bulb primer on a yamaha 2 stroke watercraft, it will not start when cold withoutv starter fluid. Also it seems to smoke alot when idling.


First - Never use starting fluid on a 2 stroke engine. It could wash the oil off the bearings and cause the engine to seize. Try using WD-40 to start it when it is cold. Another thing to try is getting a spray bottle and put your mix gas in it - then spray that into the carb to get it started.

Most of the primar bulbs are 'universal'. You could pick them up any boat supply house, you can also try NAPA.

Two stroke motors smoke. Here is some things to check -if it is oil injected see if you can adjust the amount of oil, if you have to premix the gas, double check your mixture ratio. I like to run most two stroke engines at 40:1 but use good quality 2 stroke oil.

Aug 07, 2009 | Boating

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