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Mercury 150 black max it starts and idles great. It will run
Mercury 150 black max it starts and idles great. It will run sluggish and slow and if I full throttle it dies every time … read more
Charles
Charles
Certified Mercury Tech
5,638 satisfied customers
135hp merc best way to time it is it on the water hooked to
135hp merc best way to time it is it on the water hooked to the trailer or static timing won't plane out unless I advance the wot screw… read more
Charles
Charles
Certified Mercury Tech
5,638 satisfied customers
3.7L. 165 4cyl mercruiser engine 1988 at idle engine runs
3.7L. 165 4cyl mercruiser engine 1988 at idle engine runs fine...apply gas speed increases then slowly dies to point of stalling if not taken out of gear or starts accelerating then engine starts chok… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
19,618 satisfied customers
I have a 1980 evinrude 35 hp electric start remote control
i have a 1980 evinrude 35 hp electric start remote control outboard on my 16' sea nymph. the motor has 115 PSi compression on both cylinders and has a strong spark. fuel lines, gas tank, primer bulb a… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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1980 25 hp japanese built Mariner (Yamaha) runs great unless
1980 25 hp japanese built Mariner (Yamaha) runs great unless you run wide open. When you open throttle wide open it goes about 50 ft like a scalded ape then dies. After a few pulls it fires back up an… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
I have a merc 200 saltwater 2005 carb. Motor runs fine until
I have a merc 200 saltwater 2005 carb. Motor runs fine until I get into rough water offshore. motor runs good at about 3800+. If I try to ease back a little it will slowly run slower and slower until … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
My 1987 Yamaka 9.9 4stroke full thrust freshwater kicker with
My 1987 Yamaka 9.9 4stroke full thrust freshwater kicker with remote contol cables will start, but not rev to full power. Suddenly lost reverse gear as well. Recently overhauled/serviced/carb rebuilt … read more
Charles
Charles
Certified Mercury Tech
5,638 satisfied customers
I have a 2000 Mercury 125 HP carbed 2+2 outboard. Carbs were
I have a 2000 Mercury 125 HP carbed 2+2 outboard. Carbs were rebuilt 20 hrs ago along with compression test & LU pressure test - everything checked out fine. All fuel lines were also replaced with "et… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
19,618 satisfied customers
I have a 1979 115 Evinrude. Replaced the water pump, fuel
I have a 1979 115 Evinrude. Replaced the water pump, fuel lines, fuel pump, new spark plugs, inline fuel filter, and rebuilt the carbs. When I put her in after all of this she ran fine...I even got he… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,406 satisfied customers
We have an XR120 Merc on a Sugar Sand. When pushed to WOT
We have an XR120 Merc on a Sugar Sand. When pushed to WOT the overflow tube between the two carbs fills with gas and floods to the top of the airbox and enrichens the mixture between 3/4 and full thro… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
19,618 satisfied customers
I just bought a 1990 starcraft with a 5.7 350 omc in it. I
I just bought a 1990 starcraft with a 5.7 350 omc in it. I put new plugs, points and a carb kit in it and the boat is still real slow to get up on plain. If you give it full throttle when trying to ta… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 1996 Seadoo GTX that idles fine, but when I try to
I have a 1996 Seadoo GTX that idles fine, but when I try to accelerate fast, it starts to accelerate, and then there is a loss of power. If I keep the throttle held down, it will surge and then cut ou… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Just bought a boat with a 1989 (I think) 402 Merc. Owner said
Just bought a boat with a 1989 (I think) 402 Merc. Owner said "It ran fine last year." It does start cold, idles ok, then dies when shifted into gear. If I use the throttle I can get it to take off. T… read more
K. Kergan
K. Kergan
Inboard/Outboard Mechanic
Vocational, Technical or Trade Scho
1,031 satisfied customers
After motor idle for several weeks, Honda 9.9 outboard either
After motor idle for several weeks, Honda 9.9 outboard either refuses to start or, more often starts but will not take increased throttle under load (in grear) until I change plugs, let it idle, incre… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
2005 yamaha 4stroke 15hp Runs great full throttle. After full
2005 yamaha 4stroke 15hp: Runs great full throttle. After full throttle it idles poorly. If you start out day at idle and troll motor will idle great, just as long as you don't go full throttle. After… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
hey there , well we are all stuck here , my 50 horse 2000 johnson
hey there , well we are all stuck here , my 50 horse 2000 johnson will not go to full rpms. I have reset the linkages to the manuals instructions ,throttle, timing , carb sync, throttle cam pickup on … read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
My 1996 Mercruiser (5.7 ltr) is having difficulty starting-
My 1996 Mercruiser (5.7 ltr) is having difficulty starting- ignition system (starter, coil, distributer cap, rotor and plugs are all brand new. When boat does start it runs great under med- full throt… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,392 satisfied customers
cant figure it out rebuilt the carbs and the boat bogs down
can't figure it out rebuilt the carbs and the boat bogs down stalls and hard starts on the water with a load. Lots of ether fires it up though. The gas is pure. compression and spark is fine,new gas t… read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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