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Optimax missing at idle. Optimax 250xs racing missing at
optimax 250xs racing missing at idle possible air injector bad … read more
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Got a 1999 merc optimax been sitting for awhile need to know
got a 1999 merc optimax been sitting for awhile need to know the fuel line diagram from vapor canister … read more
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My son has a 2007 mercury 225 hp xl. We bought it 2 yrs ago.
My son has a 2007 mercury 225 hp xl. We bought it 2 yrs ago. It ran well at 5600 to 5800 rpms. New power head with 50 hrs when we bought it. It has the smart gauges. It set up a few months with Stabil… read more
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I have a 2002 merc. optimax 135L DFI manufactured in July2001.
I have a 2002 merc. optimax 135L DFI manufactured in July2001. Serial# ***** It came on a 18.5 foot fiberglass pro craft fish and ski. With one passenger and myself the motor performs good. When you l… read more
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...My 2004 90hp Optimax has ran great forever it seems. At
...My 2004 90hp Optimax has ran great forever it seems. At a tournament, mid-day,without warning, it would not [rev over 2800 rpm, get on plane. it will rev up to wot when you take it out of gear. i h… read more
Tan
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2005 225 DFI saltwater series, ideals bad when it is cold,
2005 225 DFI saltwater series, ideals bad when it is cold, but after it warms up the engine ideals about 1200 rpms. The throttle positioner appears to be closed, I have 13 volts before start and it co… read more
Clamp-onTech
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hi my names todd I have a 2005 mercury optimax 225 DFIwill
hi my names todd I have a 2005 mercury optimax 225 DFI will not start and run I replaced a fried air compressor cleaned the rail out with compressed air after disassembling reinstalled everything and … read more
Jason
Jason
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Vocational, Technical or Trade Scho
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buying a 2005 mercury optimax 200sx for 184 champion bass boat.
buying a 2005 mercury optimax 200sx for 184 champion bass boat. what u think. has 223 hours on it is that alot for this engine.most of time on it is between 3000 an 4000 an idle.… read more
marinedoc
marinedoc
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I have a 2005 Optimax 225. Engine idles fine and runs at top
I have a 2005 Optimax 225. Engine idles fine and runs at top end fine, however, when I throw the throttle, it bogs out, sputters, for several seconds(upwards of 15 seconds) before slowly picking up RP… read more
Noel
Noel
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I have a 1999 Optimax dfi 135 6 cylinder that I never had a
I have a 1999 Optimax dfi 135 6 cylinder that I never had a problem till this year. The boat runs great on rabbit ears in the driveway but under a load it sounds like it is starving for fuel when tryi… read more
Jeremy R
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WHY WOULD MY 225 OPITIMAX REV UP TO 6000 RPMS ON START UP AND
WHY WOULD MY 225 OPITIMAX REV UP TO 6000 RPMS ON START UP AND STAY THERE? I WAS IDLING ENGINE THEN TILTLED MOTOR UP A LITTLE THEN RPMS SHOOT UP AND STAYED AT 6K I STARTED BACK TWICE AND IT SHOOT UP TO… read more
Abiorca
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hi , optimax 2000 225hp....will not idle and have lost top
hi , optimax 2000 225hp....will not idle and have lost top end speed. Have had mecury mechanic check out all electrical system and compression has been tested to about 110 on each cylinder. have also … read more
Noel
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Marine mechanic
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I have a 225 Optimax, 2001 Water is spraying into the cowl
I have a 225 Optimax, 2001 Water is spraying into the cowl ....is there a frost plug in the engine ....it looks like a screw has backed out of the hole |When I look at the front of the engine it is lo… read more
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Vocational, Technical or Trade Scho
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I have bought a Optimax 225 2001 with only 100h. I thougt that
I have bought a Optimax(NNN) NNN-NNNNwith only 100h. I thougt that I made a grate purchase, but my mechanic has been working with it for 2 months and does not find the problem. The engine doesn't rais… read more
Jeff G.
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I have been hearing horror stories about outboard motor rebuilders.
I have been hearing horror stories about outboard motor rebuilders. does anyone know of a reputable rebuilder for mercury 225 hp optimax saltwater? I have two 2000 year model with one that is countero… read more
Jeremy R
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I am looking at buying a 1999 Optimax 150 HP. I heard there
I am looking at buying a 1999 Optimax 150 HP. I heard there were some problems with the early optimax motors. Also it has around 50 hours on it. Could it be that it was used too little? The owner just… read more
Pappy's Sales and Service
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I have a 225 Mercury Optimax (1999) outboard that does not
I have a 225 Mercury Optimax (1999) outboard that does not go over 2000 rpm. I have good fuel, but water is somehow mixing with fuel after is goes through the spin on f/w separator. I found water in t… read more
Mechman45
Mechman45
Vocational, Technical or Trade School
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2001 mercury 225 optimax set powering aCustomer, starboard
2001 mercury 225 optimax set powering aCustomer, starboard enging wont power up past 3750 rpm full throttle. port 4900, neutral they both redline just not under a load… read more
Larry B.
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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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