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I recently purchased a boat with twin offshore 150 EFI
Hi, I recently purchased a boat with twin offshore 150 EFI motors. I took it out twice last fall and all seemed ok, including flushing with the mickey mouse. I remember that after a couple of minutes … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
Motor will run fine, I'll stop and restart and all is good.
Motor will run fine, I'll stop and restart and all is good. After about 3 start attempts, motor will stall and cannot restart. After a few hours motor will restart with same same problem stated above.… read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
5,207 satisfied customers
Need to change water pump on a 2006 4 stroke 3 cilinder efi
need to change water pump on a 2006 4 stroke 3 cilinder efi or 154449 v f25ml … read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
5,207 satisfied customers
Need to hook up key switch to merc 25hp efi 4 stroke not in
need to hook up key switch to merc 25hp efi 4 stroke not in boat wiring hookup to engine … read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
5,207 satisfied customers
I have a 2014 mercury 150 4 stroke EFI. when running on a
I have a 2014 mercury 150 4 stroke EFI. when running on a water hose at the base on motor it seems to have all cylinders not firing at full throttle. I Know it does it in neutral by design with the gu… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
My 2006, 90 HP, 3 cylinder Mercury outboard engine (S/N:
My 2006, 90 HP, 3 cylinder Mercury outboard engine (S/N: 1B443652) runs fine for a little while, then it drops a cylinder and loses horsepower. I then slow the engine down to a lower RPM, it starts hi… read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
5,207 satisfied customers
There, The boat is a 6 x metre Deep V-Hull. Can be use
Hi There, The boat is a 6 x metre Deep V-Hull. Can be use offshore but will mostly be used on the river fishing, crabbing and skiing and maybe pull one or two or three kids on tube or like wise behind… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I'm mounting a 25hp Mercury 4 stroke Bigfoot on a 14 foot Sylvan
I'm mounting a 25hp Mercury 4 stroke Bigfoot on a 14 foot Sylvan aluminum boat. Merc recommends having the anti-ventilation plate in line or within 1" below the bottom of the boat. Currently, the plat… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 2002 16 ft boston whaler dauntless with a two stroke
I have a 2002 16 ft boston whaler dauntless with a two stroke 115 hp mercury? Would a four stroke 90 hp be heavier on the back and change the boat performance And would it pull skis?… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
Hi Jason, I wanted to ask you about one of your customers
Hi Jason, I wanted to ask you about one of your customers questions in regards XXXXX XXXXX 2007 Mercury 25 HP efi 4 stroke warning lite and chime. starts issue. I have the same problem with my engine … 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
I have a 250 efi mercury 1999 and having overheating issue
I have a 250 efi mercury 1999 and having overheating issue at 3000rpm after 3 to 5 minutes of operation?? This has been going on for about a year we have tried everything , popped valves pulled the cy… read more
Charles
Charles
Marine Mechanic
Certified Mercury Tech
5,207 satisfied customers
I have 2003 Mercury 25hp 4 stroke Bigfoot, Model 25ELPT 4S,
I have 2003 Mercury 25hp 4 stroke Bigfoot, Model 25ELPT 4S, Serial #OT730866. Came from low altitude to 8000 ft in CO. Have tried to adjust mixture, engine floods at low idle & dies. Have been told mi… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
Im looking at buying a new tracker 165 boat weight is app.
I'm looking at buying a new tracker 165 boat weight is app. 845 lbs. I want to purchase w 20 EL four stroke mercury. The dealer has to order the 20 EL but has boat in stock w 40 four stroke. He told m… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
18,277 satisfied customers
I have a 175 4 stroke runs about 15 /20 min runs rough then
I have a 175 4 stroke runs about 15 /20 min runs rough then won't accelerate at 2500 3000 rpms shuts way down and rev light comes on,and runs rough.I can run at 2500 rpms fine like nothing is wrong.. … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Hi - dont know whether anyone can offer advice. Im looking
Hi - don't know whether anyone can offer advice. I'm looking at buying a 4m inflatable with a 2005 Mariner Marathon 25hp 2 stroke. Allegedly the outboard is in mint condition. I understand that the Ma… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
have a mercury 50hp 4stroke efi 2004 it starts and runs fine
have a mercury 50hp 4stroke efi 2004 it starts and runs fine for about half a hour then starts cutting out at full revs and lumpy in rest off rev range engine has sat in garage for 2 years before bein… read more
shane j forrest
shane j forrest
Vocational, Technical or Trade Scho
270 satisfied customers
I have a 2006 25hp EFI 4 stroke. I was adding oil to it tonight,
I have a 2006 25hp EFI 4 stroke. I was adding oil to it tonight, hooked up my hose to the water intake to start the motor and let it run for 5 to check oil level. When I start the motor I get a single… read more
Jeremy R.
Jeremy R.
5,362 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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