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1999 50 hp. Had vro replaced with reg fuel pump. Replaced
1999 50 hp Johnson. Had vro replaced with reg fuel pump. Replaced fuel hose and portable tank. New plugs have plugged off oil line was told that wires for vro are disconnected. Engine revs up to over … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Have a 90HP 3 cylinder mercury outboard ser.no OT 645779. it
have a 90HP 3 cylinder mercury outboard ser.no OT 645779. it does not start on its regular gas fuel system. I cleaned the carburetors, rebuilt the fuel pump, cleaned the oil tank, filled with fresh oi… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
90hp mercury 3 cylinder mid 80;s. i have replaced evrything
90hp mercury 3 cylinder mid 80;s. i have replaced evrything to do with the fuel. Rebuilt carbs and fuel pump. Gas tank is vented. I have spark on all three plugs. idles great and plenty of power out o… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
I have a 1987 mercury 200. Boat was running fine the
I have a 1987 mercury 200. Boat was running fine the suddenly won't go over 2-3k rpm under a load. I have checked resistance on stator and trigger both are in spec. I have replaced plugs ( ngk BU8H) a… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,713 satisfied customers
Jeff I have a Mercury 6cyl 90hp 1978 which starts well ,ticks over well will run on hal
Hi Jeff I have a Mercury 6cyl 90hp 1978 which starts well ,ticks over well will run on half throttle fine but when more than half throttle is applied it seems to bog if I leave morse in flat out posit… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 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
22,043 satisfied customers
Problem: I have a 1985 90hp Johnson motor, it has been having
Problem: I have a 1985 90hp Johnson motor, it has been having trouble with idling, it splutters around a lot and then stalls, this happens when it is under the 1000 RPM mark, after that it seems to be… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
Hi I have a mercury inline 6 90hp with distributor, I have
Hi I have a mercury inline 6 90hp with distributor, I have stripped the engine due to a faulty compression tester!! long story, it was in excellent condition, and has good compression to all cylinders… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 1999 Mercury 90 hp 3 cylinder carb. , runs rough at
I have a 1999 Mercury 90 hp 3 cylinder carb. , runs rough at an idle up to about 1200 rpm. Seems to smoke more than normal. Motor is a recent purchase on a 25 pontoon boat. Ran compression almost 120 … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,507 satisfied customers
1998 suzuki v twin 4 stroke 25 hp outboard starts to missfire
1998 suzuki v twin 4 stroke 25 hp outboard starts to missfire at about half throttle and revs will not increase, sound like running on one cylinder. Sometimes when warm second cylinder seems to fire a… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
i have an old Searay 1985. after towing for about 4 hours
i have an old Searay 1985. after towing for about 4 hours we started to experience problems. can not get over about 3k RPMs at half throtle runs very well but full throtle boggs out and stalls. so far… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
I have a 2003 Yamaha 90hp 4-stroke outboard (F90TLRB). When
I have a 2003 Yamaha 90hp 4-stroke outboard (F90TLRB). When cold I get a hard start, rough idle, and some stalling. Once the motor warms up, after nursing the trottle to keep it running, it purrs like… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
I have just inherited a pontoon boat with a 90hp 3 cylinder
I have just inherited a pontoon boat with a 90hp 3 cylinder mercury on it. I at first could not even get it to start and now since changing the plugs and treating the fuel I can start and idle it all … read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,713 satisfied customers
I have a 9.9 hp Mercury outboard on a pontoon boat. It purs
I have a 9.9 hp Mercury outboard on a pontoon boat. It purs like a kittle in idle at full throttle but when I place in gear at put in full throttle it seems as if it is only running at half speed. Any… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
2,713 satisfied customers
Hi there --I have a 4 yr old 50 horse honda (was brand new)
Hi there --I have a 4 yr old 50 horse honda (was brand new) , on an Ercoa pontoon with VERY FEW hourson the motor. the three carbs were not taken care of or drained by my now fired boat mech, and varn… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
1979 Mercury 115 Had not used boat for a month. Was run close
1979 Mercury 115 Had not used boat for a month. Was run close to empty last time so I added 12 gallons yesterday. Went to squeeze bulb and couldn't get any gas in line. Disconnected line from motor sq… read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
We have a Mercury 90hp 2 stroke 3 cylinder outboard. We have
We have a Mercury 90hp 2 stroke 3 cylinder outboard. We have just finished replacing the ignition switch, spark plugs and cleaning the carburators. The motor starts, idles and runs fine up to 3500 rpm… read more
ROCKET
ROCKET
MASTER CERTIFIED TECH
Vocational, Technical or Trade Scho
426 satisfied customers
My boats been in storage for about 18 months. 90hp mariner
My boats been in storage for about 18 months. 90hp mariner outboard. I sprayed some type of storage spray into the works before storage. I topped it off with about half a tank of fresh fuel. It will c… 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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