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I have a 2007 150 mercury EFI. It is running too hot. Going
I have a 2007 150 mercury EFI. It is running too hot. Going into guardian mode. I have replaced the water pump assembly, 143 degree Thermostats, poppet valve,base gasket, adapter plate gasket, head ga… read more
Charles
Charles
Certified Mercury Tech
5,453 satisfied customers
I have a 2009 EFI Mercury 150. I can only trim the motor so
i have a 2009 EFI Mercury 150. I can only trim the motor so high. It only runs around 50 mph. i know on my 186 triton it shout run close to 60 mph. Could this be a prop issues or a trim issue? Thanks … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
i have a mercury 150 efi 2007, after changing impeller, i can
i have a mercury 150 efi 2007, after changing impeller, i can not insert the drive shaft back on. looking up the drive shaft hole ,i see a ring blocking the hole. what is it??… read more
Charles
Charles
Certified Mercury Tech
5,453 satisfied customers
I have a 2007 Mercury 150hp EFI 2storke outboard...I started
I have a 2007 Mercury 150hp EFI 2storke outboard...I started it up to head home sunday afternoon and it smoked like a freight train (it hasn't ever smoked much in the past). Yesterday I was cleaning i… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 2003 mercury 150 efi saltwater edition that is overheating.
I have a 2003 mercury 150 efi saltwater edition that is overheating. It only overheats at a high rpm, It doesn't overheat at an idle or when running under 10 mph. I have already replaced both thermost… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
How many gph can the 2012 Mercury 150 efi get when mounted
How many gph can the 2012 Mercury 150 efi get when mounted on a Harbercraft 1925 Discovery?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
did mercury ever build a 2.o litre efi my cowling says 2.o
did mercury ever build a 2.o litre efi my cowling says 2.o litre 98 150 just had new power head put on dont run right over loading guy at marine said he never seen 2.0 litre efi thinks computer is fee… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
my 2007 150 Mercury EFI 2 stroke is failing to make high speed,
my 2007 150 Mercury EFI 2 stroke is failing to make high speed, at full throttle it runs but only half speed at best. stalls also - has new plugs and fuel filters. It has 330 hours on it. what should … read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
Hi I have a1998 1800 capri bayliner with a 120 force and was
Hi I have a1998 1800 capri bayliner with a 120 force and was wanting to up grade to a 150 efi mercury outboard.Will the transom be strong enough for this outboard . Or can the boat handle more or less… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
Considering buying a 24 tritoon with a mercury 200hp EFI (year
Considering buying a 24' tritoon with a mercury 200hp EFI (year 2001) motor. Paperwork says there are only 150 hours on this engine (hard to believe - 10 years old and average use of only 15 hours/yea… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
How many hours should I get on a Mercury 2002 225 HP OB EFI
How many hours should I get on a Mercury 2002 225 HP OB EFI before any major repairs are needed and what are the earliest problems that may occur and how do you try to avoid them? What is the solution… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
I have a 1980 mercury 150 on a 18ft champion bass boat. I need
I have a 1980 mercury 150 on a 18ft champion bass boat. I need to know what is a good prop size to start with? The prop was stolen and I haven't a clue as to what size it was.… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
Hi I have a 08 150 EFI on my bass boat. would i get more top
Hi I have a 08 150 EFI on my bass boat. would i get more top end. and all around better performance with the new mercury 150 pro xs optimax. thanks kevin… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
Im considering buying a 2004 Sea-Doo Islandia with a Mercury
I'm considering buying a 2004 Sea-Doo Islandia with a Mercury Jet Drive. I've read on some postings that it may be difficult to get work done and parts for the Mercury Jet Drive. Do you have any infor… read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,556 satisfied customers
Dear,Maestro. I have boston whaler 235 with 2 mercury 150
Dear,Maestro. I have boston whaler 235 with 2 mercury 150 optimax EFI made 1998. Both of engine starting well but one of engine has problem. I changed fuel cleaner of inside engine & tiny mesh part of… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
I am looking at a 2000 bass boat with a 150 hp mercury optimax
I am looking at a 2000 bass boat with a 150 hp mercury optimax motor. I was told they had alot of problems with opimax motors. In your opinion are these motors relieable And is there more maintenance … read more
Jack
Jack
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Vocational, Technical or Trade Scho
54 satisfied customers
Im buying a 2008 crestliner 1850 fishhawk with a 2007 mercury
I'm buying a 2008 crestliner 1850 fishhawk with a 2007 mercury 150 EFI engin. what prop do i start with?… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
i installed a 2001 150 hp efi mercury outboard on my ...
i installed a 2001 150 hp efi mercury outboard on my 2007 tracker party barge and have different harness connectors. the engine has a 12 pin connector and the merc controls on the pontoon boat have a … read more
bluestreak21
bluestreak21
Service manager,owner of marine business
Vocational, Technical or Trade Scho
14 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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