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My 200 hp was running find but when I slowed down the engine
my 200 hp Johnson was running find but when I slowed down the engine bogged down and had not much pick up. Now it starts easily, idles a little high rpm and then shuts down after two minutes. I change… read more
Boat Doc
Boat Doc
253 satisfied customers
I have a 40 hp 3 cylinder 1999? Mercury that will run full
I have a 40 hp 3 cylinder 1999? Mercury that will run full throttle for about 30 seconds (about 5000 rpms) then cuts back to 3500 rpms. It will run at idle speed for a longer period. I pump the bulb a… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
50 hp 1974 evinrude 2 cylinder i have trouble with getting
50 hp 1974 johnson evinrude 2 cylinder i have trouble with getting on plane and worse is that the motor runs great cold but after running it starts to lose power … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
1970 20hp Johnson outboard tiller drive starts and ideals great
1970 20hp Johnson outboard tiller drive starts and ideals great once in forward gear at low rpms runs good at high starts to shake and have trouble powering … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 70 hp Evinrude that I just bought (used). Ran fine
I have a 70 hp Evinrude that I just bought (used). Ran fine on sea trial. Ran fine today for first hour, now seems like it is missing on a cyl. Cooling water NEVER got above ambient.… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Have a 1990 50 hp evinrude motor ... Starts fine but does when
Have a 1990 50 hp evinrude motor ... Starts fine but does when put it in gear or let it idle too long . Also have a button below the ignition switch which seems to be able to rotate left and right but… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
Have a 1987 Johnson 150 HP starts ok but at open throttle will
Have a 1987 Johnson 150 HP starts ok but at open throttle will not reach max speed only runs at very low speed… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 93 Johnson 40 horseI think I have fuel pump problems
I have a 93 Johnson 40 horseI think I have fuel pump problems I have to pump the bubble to keep it runningI replaced all the fuel lines and bubble it has a vro pump can I replace it witha different pu… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1983 johnson 70 hp outboard that "flutters" when I
I have a 1983 johnson 70 hp outboard that "flutters" when I try to accelerate, especially at higher speeds. I don't think it is fuel . ( The carburetors have been apart so many times that I think mayb… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1970 Johnson 85 hp seems to idle fine runs real rough
I have a 1970 Johnson 85 hp seems to idle fine runs real rough from just off idle to 1/2 throttle after 1/2 to full runs great any ideas? It does have new plugs and new gas… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
70 Hp 1999 Johnson intermittently runs at half revs after 20
70 Hp 1999 Johnson intermittently runs at half revs after 20 mins running have replaced coils and main ignition box. Warren nz… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
I have a 96-70hp johnson ob. motor completely rebuilt. from
I have a 96-70hp johnson ob. motor completely rebuilt. from fuel tanks, key switch to pistons. the only thing not rebuilt or replaced charging coils, timing coils, temp sender(temp sender unhooked). S… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
2000 70 hp Johnson ... seems to loose fuel prime @ idle & die.
2000 70 hp Johnson ... seems to loose fuel prime @ idle & die. New primer bulb yesterday. Ran perfect last fall. No leaks detected anywhere. If I keep squeezing the bulb, it keeps running. Any suggest… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1988 85 hp force motor The problem I am having is
I have a 1988 85 hp force motor The problem I am having is it will run really well for about a quater of a mile and tends to fall off and stalls out when I restart it it seems like it is not running o… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
1970 or 71 mercury 200 20 hp. After replacing impeller and
1970 or 71 mercury 200 20 hp. After replacing impeller and old fuel, motor starts and runs great but does not attain full speed. Also engine stops at full throttle under load as if flooding out. Any i… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,557 satisfied customers
1985 johnston vro v4 90 hp/ fuel diafram dies under load
1985 johnston vro v4 90 hp/ fuel diafram?? die's under load and after running no load full throtol dies like not recieving fuel some times squezing ball stays squezed like vaccum & nbsp; Ken… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
I have a 99 Johnson 15hp outboard that runs great wot for apporx
I have a 99 Johnson 15hp outboard that runs great wot for apporx 1 miunte before it starts to run like i reduced throttle by an eighth of a turn.this reduces speed enough to bring boat off plane.i cha… read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
Johnson outboard ocean runner(NNN) NNN-NNNN The engine develops
Johnson outboard ocean runner(NNN) NNN-NNNN The engine develops good power and acceleration however after 3-5 min of full throttle the engine starts to die and sounds as if its running on 3 out of 6 c… read more
Michael
Michael
master marine technician/charter captain
Vocational, Technical or Trade Scho
256 satisfied customers
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Jeff G.

Jeff G.

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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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