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1997 carb 150 merc fuel starved at WOT Runs fine until wide
1997 carb 150 merc fuel starved at WOT Runs fine until wide open. Sucks bulb shut/ Have changed entire fuel line, new fuel pump new anti siphon valve and problem still exists. good fuel. no water. Pic… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
2001 PCM 5.7 TBI. Need help diagnosing aand fixing a
2001 PCM 5.7 TBI. Need help diagnosing aand fixing a hesitation occurring only at WOT, also the spark plugs look like rich condition is present. I have an MEFI diagnostic scan software that shows a lo… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I am in the process of replacing a 1980s 90hp Evinrude with
I am in the process of replacing a 1980s 90hp Evinrude with a 1998 Mercury 75hp. My boat is a 4.8m Seafarer. I am trying to research the merc to establish such as how many cylinders; if its oil injected; how it compares to the Evinrude in weight and how it compares in performance (will I suffer a decrease in power by substituting the 75 Merc). Is there anything I should be aware of with the Mercury. I would really appreciate your help. Cheers Leigh … read more
Charles
Charles
Certified Mercury Tech
5,157 satisfied customers
John here. I have a 1997 90HP Merc, oil injected. Last outing, my tack dropped to zero
Hi, John here. I have a 1997 90HP Merc, oil injected. Last outing, my tack dropped to zero, and looks like battery not charging. I read earlier post saying it is a rectifier/regulator. Which does mine… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have a Mercury 75 which starts fine from cold with choke and runs quite well, bit of
Hi.I have a Mercury 75 which starts fine from cold with choke and runs quite well, bit of misfire but have treated it with quicksilver additive which appears to have improved things. However it won,t … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
Several years ago, I exchanged a 75 HP Merc 75 HP(1997)
Several years ago, I exchanged a 75 HP Merc 75 HP(1997) on my houseboat. Cost a bunch to have rigging, gauges cables, etc to complete swap. Now would like to go bigger HP, but having trouble finding g… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
yes, I have a 2006 merc 250 pro xs racing It seems to loose
yes, I have a 2006 merc 250 pro xs racing It seems to loose its bit at high rpms and the back end of bass boat goes sideways could I have a bad coil pack or what could it be… read more
Charles
Charles
Certified Mercury Tech
5,157 satisfied customers
I have a 90hp Merc outboard. To start I need to put level
I have a 90hp Merc outboard. To start I need to put lever in N position. Now it won't start unless I slightly move the lever around N with the key on start. Finally I get the sweet spot and it starts.… read more
Expert
Expert
I have a 1998 sea rayder f16xr with a 175 sport jet. I can
I have a 1998 sea rayder f16xr with a 175 sport jet. I can start it, but it runs very rough. I have drained the fuel thinking it was bad. I put fresh fuel in, but still same results. Any suggestions?… read more
Charles
Charles
Certified Mercury Tech
5,157 satisfied customers
bayliner ciera: james i ve install a 454 mpi in my 2855 bayliner
james i 've install a 454 mpi in my 2855 bayliner ,the prop i am running is a 18 inch 4 blade aluminum ,at 26 mph the motor revs at 4000 rpm ,is that a little high, and do you have a sugestion to what… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I just took a 2003 Larson 330 Cab for a sea trial, it has twin
I just took a 2003 Larson 330 Cab for a sea trial, it has twin carb 5.7 Mercs rated at 250 hp per. It had full fuel (220 gal) and some gear and water, 3 men (total 600 lbs) It would plane off very qui… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
1998 merc 2 stroke oil injected 90 hp.runs rough wet plugs
1998 merc 2 stroke oil injected 90 hp.runs rough wet plugs after installing new plugs within 3 minutes of running.carbs are set one and a half turns from light seat.used earmuffs and ran to 3000rpm st… read more
Charles
Charles
Certified Mercury Tech
5,157 satisfied customers
2003 johnson 90hp 2 stroke misfires under load. model #j90plstc.
2003 johnson 90hp 2 stroke misfires under load. model #j90plstc. Boat has perfect compression and what looks like a great spark on each cylinder when put clear spark tester on. New fuel water seperato… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,264 satisfied customers
I have. 1979 90HP Merc OB. The tell tail water discharge is
I have. 1979 90HP Merc OB. The tell tail water discharge is becoming hotter over the last two years to the point you cannot put your hand in it after the motor is run for 10 to 15 minutes. I changed t… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
17,310 satisfied customers
I have a j90plsif 2001 johnson and I want to check my fuel
I have a j90plsif 2001 johnson and I want to check my fuel pump to make sure it is working. I have problems when over 4k rpms. My motor stumbles until i lower the rpm's. I need to make sure that the f… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 90hp 4-stroke engine on a 1675 lund explorer sport
I have a 90hp 4-stroke engine on a 1675 lund explorer sport boat, year 2008. The boat is only rated for 90hp but it is slightly under powered. Is installing a turbo-charger an easy fix or do you sugge… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,729 satisfied customers
I have a 96 90HP Johnson ELEDR looper. The engine just about
I have a 96 90HP Johnson ELEDR looper. The engine just about reaches WOT, then cuts back to about 2500 RPM. Tried a new power pack with a new optical sensor, didn't correct the problem. Being told to … read more
Whitecap36
Whitecap36
Service Manager/Technician
Vocational, Technical or Trade Scho
1,545 satisfied customers
My engine is a 1997 150 Johnson Fastrike (carbed) on a Ranger
My engine is a 1997 150 Johnson Fastrike (carbed) on a Ranger bass boat. The powerhead was replaced in 2006 and has run well until this weekend. At top speed I lost around 500-600 rpm and 3-4mph. The … read more
Master Tech
Master Tech
Service Manager/Technician
Vocational, Technical or Trade Scho
1,167 satisfied customers
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Dominick

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Tan

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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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