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    9.9 fourstroke lack of WOT

    Have a 2 week old 2006 9.9 4stroke that ran fine the first two times out.Now it will idle fine but it will not run at any higher RPM.When it is cold it will start and idle fine and will raise the RPMs slightly before it starts to sputter and die down to a poor idle.When the key switch is...
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    225 saltwater bad idle

    I am working on a 225 OX66 year 1999.I changed the the throttle cables because I thought the cables were old and starting to bind,causing the RPMs to creep up and down at idle,and at low RPMs.After changing the cables I found no change to the problem I was having. If I start the motor and let...
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    6 hp will not run without choke

    I am working on a 6 hp evinrude outboard that will not run without the choke pulled out.I rebuilt the carb and still no difference.Fuel pumps appears to be fine,it pumps when the motor turns over and it seems to have enough pressure.Compression is 80 lbs in both cylinders,and the plugs are...
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    1972 johnson 25 fuel problems

    Have a 1972 Johnson 25 that had sat for 8 years.Did a carb rebuild and replaced the water pump.<br />At first I had a rough time getting the motor to idle,as it kept popping and kicking.I did get it to idle after some time,not great but it would idle.Getting out on the water was quite...
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    Curcuit interrupter

    I have a 1990 50 hp VRO Johnson that has been giving me fits.Runs fine at idle,but when it heats up under use it begins to run poorly,and will barely run.The water pump is not the most steller pump,but it does still pump,weak at best.I notice when this poor running starts the motor is very...
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    Blocked powerhead water jacket

    Took in a F9.9 Yamaha four stroke with an overheating problem.This is a year 2000,and was sent out recently with a new waterpump inpeller.<br />While running the motor for an inspection I noticed steam coming out of the pisser,but no water.I pulled the hose nipples tubes off of the head and...
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    Sparkplug Numbers

    What is the difference in the numbers on sparkplugs,B7HS and B7HS 10?
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    WOT cutout

    Have a 1983 35 hp Johnson that just began to cutout at WOT.After it cuts out,it will restart in a short time,8-10 minutes.After restarting the motor will run fine for a few minutes and will than cut out again.<br />I ran it in a barrel for 45 minutes today and it never cut out in those...
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    F9.9 pops and sputters when cold

    Have a 2001 F9.9ELRZ that when first started will idle fine,until I try to raise the RPM's.When I attempt to raise the RPM's the motor will pop and sputter,and some times die.This will persist until the motor gets hot.After the motor cools somewhat it will do the same thing all over again.The...
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    9.9 fourstroke carb problems?

    I have a 9.9 4 stroke that when starting will pop and sputter when cold.It will idle ok but when applying throttle it pops and sputters for a minute or two before getting warm.Some times it will stall out completely.After it gets warm it will smooth out and run fine.<br /><br />Any ideas?
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    9.8 Merc lower seals

    Just completely redid all seals in the lower end of a late 70's early 80's 9.8.<br />Within several weeks the lower unit started pushing oil and water mixed UGH up and out the seams and exaust ports etc.Checked the lower end and the oil was mixed with water (milky) and low.<br />Removed lower...
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    Loss of WOT Johnson 9.9

    Have what I believe is an 1987 Johnson 9.9 that runs great in the test can,but when running on the boat the motor acts up.It runs great at low rpm,however when you open it up the motor cuts out at the top end.Using a timing light I found the motor still fires at the top end when it dies...
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    Duel battery hookup

    Can any tell me how to go about hooking up a boat with two batterys,not 24 volts,and with a battery switch in use.<br />The switch lets you choose Battery 1,battery 2,all,or off.
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    Waterpump impeller on 90 Johnson

    Have a J90vlsss Johnson that needs an waterpunp impeller.A quick look at the motor only instilled dread in me,as there appears to be a huge amount of work to do to remove the lower end.<br />Or perhaps I am making more out of this than is neccessary.<br />How does the shift rod get released in...
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    9.9 will not idle

    Have a 1995 9.9 evinrude.It will not idle.I have chanced the tank,fuel line,fuel pump but it still stalls at low RPM.<br />I have cleaned the carb,changed the plugs and have no idea where to go next.<br />It runs good at mid to high RPM,s but when you return the throttle to the idle position it...
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    9.9 Tach

    I have a 1991 9.9 evinrude that I want to rig a Tachometer to.<br />I am looking to attach a quick disconnect harness<br />that I can remove when I need to take the motor off the boat.It is a tiller handle motor.<br />What wires do I use to rig this,if it can be done.<br />Will it effect the...
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    7.5 merc

    Have a 7.5 merc around 1970,Motor is in fairly good condition,so it is wortyh fixing.<br />There is spark when you first test it with a spark tester.However after a short time,several minutes the spark is gone.If you let the motor sit for a time,the spark will again be there when you test it.<br...
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    2001 Yamaha 90

    Have a 2001 yamaha 2 stroke that sat in a dealership for three years and than was sold to the dealership I work at<br />Motor starts but runs rough.When it got to the shop it was missing the sparkplug ends and a few other items.<br />When I start the motor I can pull the plug wire off of the...
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    Sunk Motor

    Just recieved a 9.9 evenrude that was under water in one of the last few hurricane's.<br />What is needed to be done,and where do I start?
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    9.9 Yamaha

    Have a 2001 tiller model 4stroke 9.9 that when started runs fine.After several seconds (30) it starts to run rough,and will not let you advance the throttle.When you do so it just sputters and pops out the carb.I cleaned out tye carb ,(it was not dirty),changed the carb with a new one,no help.I...
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