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I have problems with a 1998 merc offshore, 250 HP. the
I have problems with a 1998 merc offshore, 250 HP. the overheat alarm sensor and 'rpm limiter kick on momentarily, with a single tone and then release as the boat settle down off plane, and then kick … read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
250 Merc Optimax stall at 600 RPMS, 250 Merc hard to start
250 Merc hard to start wont stay running, stalls at 600 RPMS, stall when put into gear … read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
Merc 4.3 EFI (TBI) beeps once and stalls at low speed in
merc 4.3 EFI (TBI) beeps once and stalls at low speed in gear. Starts right up, then does the same thing. … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
Got twin merc optimax saltwater series 115 hp 280 hrs each and last few times out an alar
Got twin merc optimax saltwater series 115 hp 280 hrs each and last few times out an alarm beeps almost permanently and only goes away when I reduce throttle. When this occurs engine looses power. Ala… read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
Tan, you helped me a few years back on a similar problem
Tan, you helped me a few years back on a similar problem with this engine (1997 Mercury 250 EFI Offshore series model 250CXLEFI. SN: 0G469985). I have poor acceleration and do not reach full power. I … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 2010 250 pro xs. getting a 4 beep alarm and a solid
I have a 2010 250 pro xs. getting a 4 beep alarm and a solid alarm at wot. but neither happens all the time… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
good morning,my Merc 150 EFI engine alarm is going off. water
good morning,my Merc 150 EFI engine alarm is going off. water pump seems to be working and the oil containers are filled. when RPM is set a tad higher than idle a direct stream of water is coming out.… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 2002 150 efi mercury smart craft. the last two weekends
I have a 2002 150 efi mercury smart craft. the last two weekends I have been having trouble with my alarm going off. It's a steady beep as soon as you turn the key . The first weekend it would quit af… read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
Have a 2000 225 merc it hunts at an idle and at 2000 rpm the
Have a 2000 225 merc it hunts at an idle and at 2000 rpm the engine rpm climb on there own… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 2001 Seadoo challenger 2000 with a 240 EFI Mercury
I have a 2001 Seadoo challenger 2000 with a 240 EFI Mercury V6. A few weeks ago the engine would start but not idle properly and then stall. Once it warmed up I could put it in forward and use it. The… read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
I have a 2007 (bought new in 2010) Mercury EFI 40 with jet
I have a 2007 (bought new in 2010) Mercury EFI 40 with jet drive. According to my dealer it is common for these engines to loose power at higher elevations. The best I can get my Merc to do at high el… read more
Charles
Charles
Certified Mercury Tech
5,376 satisfied customers
Hi there. Im trying to figure out why I cant get my starboard
Hi there. I'm trying to figure out why I can't get my starboard engine (my boat is powered by twin merc 4.3L EFI's) running up to 3000+ RPM's to get on plane-my boat is a Regal 2860 Express cruiser (a… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
19,328 satisfied customers
I have a 2002 Merc EFI 225, I keep getting a series of Alarms....4
I have a 2002 Merc EFI 225, I keep getting a series of Alarms....4 beeps then it stops, and then another 4 beeps. When you get up on plane I get a constant alarm. I have no Temp gauge but show about 1… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,399 satisfied customers
I have a 50HP EfI 4 stroke ELpt big foot engine on my pontoon
I have a 50HP EfI 4 stroke ELpt big foot engine on my pontoon that is a 2002 model year. It starts great and idles well but after a few minutes of running at speeds of 3000 rpm or more, a warning tone… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
have two yamaha 250 two stroke outboards (2007) with 320 hrs engines
have two yamaha 250 two stroke outboards (2007) with 320 hrs engines give temp alarm on higher rpm changed impellers,oil,thermostatic valves,headgaskits, still same alarm on higher rpm,s display shows… read more
Noel Schembri
Noel Schembri
Marine mechanic
Diploma
1,803 satisfied customers
I have twin 8.2/502 Mercs, one engine gets to 35 hundred rpm
I have twin 8.2/502 Mercs, one engine gets to 35 hundred rpm and doesn't go any higher, push the throttle all the way but doesn't go any higher. the engine year is 2000 with 500 Hrs. on it.… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have a 21 ft. V hull shallow sport with a 1998 ProV 150 hp
I have a 21 ft. V hull shallow sport with a 1998 ProV 150 hp (Carbs) Twin Prop Yamaha on it. Its been a really awesome motor with no problems at all. Went fishing last Friday and it won't run over 190… read more
Jason Forsberg
Jason Forsberg
Outboard Marine Mechanic
Vocational, Technical or Trade Scho
531 satisfied customers
We were boating this weekend with a 5 plus mercruiser for power...We
We were boating this weekend with a 5 plus mercruiser for power...We heard an alarm go off with two beeps, approximately a minute apart. At first we thought it was the depth alarm, since we checked th… read more
mercmastertech
mercmastertech
Service Manager, Master technician
Technical School
249 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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