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1996 Mercury 40hp 2stroke 4cyl 2 carb I rebuilt carbs ...new
1996 Mercury 40hp 2stroke 4cyl 2 carb I rebuilt carbs ...new fuel pump ...and plugs ... I tried adj mix and throttle pickup adjustment I have problems idling with surges .....and also hard starting.… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 40hp, older vintage. Runs very well accept when i
I have a 40hp, older vintage. Runs very well accept when i gets warm it wants to bog down when I'm running at slow speeds. Seems to run better if I speed up… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
Hi Jeff I have a 2001 mercury 90 2stroke thats not running
Hi Jeff I have a 2001 mercury 90 2stroke thats not running very well I have changed the plugs, had a compression test done 115, and had the coils checked..all good. The motor is running rough and popp… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
40hp Mercury o/b---loads up & will stall @ idle. It has
40hp Mercury o/b---loads up & will stall @ idle. It has 2-stroke oil injection system, I accidentally ran it on a 40:1 mixed fuel on top of the injection, cause I ran out of the inboard tank of regula… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have an 82 mercury 50hp outboard 2stroke, the engine will
I have an 82 mercury 50hp outboard 2stroke, the engine will start and idle ( after I adjusted the carbs ) but it will not open up when at full throttle. Adjusting the carbs does nothing to solve this … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 1980 70 hp Mercury outboard (serial #(NNN) NNN-NNNN That
I have a 1980 70 hp Mercury outboard (serial #(NNN) NNN-NNNN That starts fine and will idle up nicely while in neutral. When i put it in gear it idles good at low speeds but usually bogs out when i tr… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I HAVE A 40HP 4CYL. 2STROKE LOW IDLE IS FINE ,IT WILL NOT ACCELLERATE
I HAVE A 40HP 4CYL. 2STROKE LOW IDLE IS FINE ,IT WILL NOT ACCELLERATE WITHOUT USING THE CHOKE… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a mid 70s 40hp mercury outboard that i took to a mechanic
I have a mid 70s 40hp mercury outboard that i took to a mechanic he rebuild the carburator and still it willnot run in the mid range. Itwill idle great but when you got to throttle up it stalls but if… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,547 satisfied customers
Have 2001 40HP 2stroke outboard has been running rough all
Have 2001 40HP 2stroke outboard has been running rough all season would die out when run a full throttle. 1st repair at Marina cleaned the Carb ports. When I brought it back on water it did same thing… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
My 1983 50 hp Mercury outboard will not idle. Starts fine,
My 1983 50 hp Mercury outboard will not idle. Starts fine, then dies. Has good spark, excellent compression, new fuel lines, rebuilt carbs. Any suggestions?… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
force 15 hp, motor runs and starts easy, after running half
force 15 hp, motor runs and starts easy, after running half or full throttel starts to loose power or stall, check fuel hose for leaks, gas tank filter, pump bulb, all working-not restricting flue flo… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 2000 40hp mercury remote 2 stroke outboard motor that
I have a 2000 40hp mercury remote 2 stroke outboard motor that will not idle in neutral. The carbs have been serviced 2 times in the last year. ($1800) I feel like i have been ripped off but can not p… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
1986 mercury 2cylander, 2stroke 40hp- just rebuilt engine (I
1986 mercury 2cylander, 2stroke 40hp- just rebuilt engine (I didn't take it apart / just put it back together) It is trying to start but it just don't seem to catch. I know it firing, have questions a… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,547 satisfied customers
I have a 89/90 40HP oil injected Mercury outboard (SN#0C160126).
I have a 89/90 40HP oil injected Mercury outboard (SN#0C160126). Had not run it for three years. New plugs/new gas with STARTRON. Starts with choke, but will not idle. As long as choke is engaged engi… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a1972 100ESL72 Engine runs strong. But after running
I have a1972 100ESL72 Engine runs strong. But after running and slow to a idle engine stops. It seems to be fuel I have the idle at 700 and if it starts I have to choke. I replaced the CD pack and coi… read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
i have not received any help at all on the engine. The engine
i have not received any help at all on the engine. The engine is a Mercury engine and there was an Evinrude mechanic on line (that was the one question i answered; what kind of engine?). The mechanic … read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
Hi,I have a 1989 40hp Yamaha 2stroke outboard motor, the motor
Hi,I have a 1989 40hp Yamaha 2stroke outboard motor, the motor generally runs very well, the motor was recondition two years ago and at the last service(4months ago) it had good compression but today … read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
my 1983 mariner 40hp 2stroke runs good at full speed, but when
my 1983 mariner 40hp 2stroke runs good at full speed, but when you power down to go slow, it just will keep cutting out , untill you can get it back to full speed?… read more
Larry B.
Larry B.
Marine Service Tech
High School or GED
574 satisfied customers
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Jeff G.

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