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II have an Evinrude 40Hp EFI, Mod#E40PL4EE. I have a 1999
I have a 1999 Evinrude 40Hp EFI, Mod#E40PL4EE I replaced water pump, thermostat and gasket and the 3 piece tell tale assembly. I get average tell tale flow when connected to hose and great water volume when on water. Problem- I get overheating alarm 3-5 mins when on water even though water flowing from tell tale. I read next step might be compressed air and blow out lines or flush from a “port” to make sure water is getting to motor. I don't know where on diagrams to push air or water. We did take to Florida gulf coast but I water hosed flushed after each day out. … read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
I have a 30 foot twin engine Donzi with twin 2000 225
I have a 30 foot twin engine Donzi with twin 2000 225 horsepower Mercury EFI has the port engine overheats anything over 3500 RPMs I've done a compression check put new impeller flush the whole engine… read more
Jason
Jason
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Vocational, Technical or Trade School
22,043 satisfied customers
1999 250 EFI, I JUST BOUGHT USED engine, 180 hours, it keeps
1999 250 EFI , I JUST BOUGHT USED engine , 180 hours , it keeps fouling out plugs in 1 min of running , fuel press is 35 at schrader valve and all cyc, are 110 compression , i pulled the gear out of o… read more
Charles
Charles
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2005 150XR6. Been dealing with some overheating issues for
Second opinion] 2005 150XR6. Been dealing with some overheating issues for quite some time now. Tried just about everything I can think of so looking for any other ideas. The problem I originally had … read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 2000 250 hp mercury efi that is overheating - the
I have a 2000 250 hp mercury efi that is overheating - the alarm goes off after idling for 5 to 10 minutes. I changed the poppet valves but alarm still goes off. There is water flow coming out the bac… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 40hp mercury efi four stroke outboard. I recently
I have a 40hp mercury efi four stroke outboard. I recently hit a sandbar and had immediate engine issues, my local mechanic has replaced the impeller and impeller housing and done a full flush but aft… read more
Jason
Jason
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It is a 2006 mercury efi 40 hp ...only been used a few
It is a 2006 mercury efi 40 hp ...only been used a few times. It was stored undercover until 2016. This year it just quit running and wont start. Gas goes to the filter … read more
Charles
Charles
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I have a mercury 25hp 3 cylinder efi 4 stroke (2009 I think)
I have a mercury 25hp 3 cylinder efi 4 stroke (2009 I think) it has water coming my out the telltail, but there is also water coming out a hole cylinder wall - right behind the fuel filter. The hole i… read more
Charles
Charles
Marine Mechanic
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I have a 2004 200hp Mercury EFI. As soon as motor heats up
I have a 2004 200hp Mercury EFI. As soon as motor heats up or I need to pull tube I can't get out of the hole without alarm going off and motor powering down. Thermostats seem fine and I have hot wate… read more
Noel Schembri
Noel Schembri
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Mercury opti max 1999 135 overheating thermostats opening poppet
mercury opti max 1999 135 overheating thermostats opening poppet valve opening but still overheating no poppet valve exhaust also looked at water jacket looked clean this problem is making nuts thank … read more
Jason
Jason
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I have a 1997 Mercury 225 EFI SN OG529104 that keeps spinning
I have a 1997 Mercury 225 EFI SN OG529104 that keeps spinning hubs. It drives a 22' Mako. I have spun 3 hubs due to melting and 3 prop seals, all in just 3 months. I reseal the lower unit and it happe… read more
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Jason
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I have a 2000 Mercury 250 3.0l EFI motor which seems to run
I have a 2000 Mercury 250 3.0l EFI motor which seems to run rough at idle. all cyl comp at 110. seems to smoth out when #2 plugwire disconnected. runs rougher when 4 or 6 plugwire removed, seems to be… read more
Jason
Jason
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I have a 1999 Mercury 200 efi thats driving me crazy. When
I have a 1999 Mercury 200 efi that's driving me crazy. When I get on the lake I will run up the lake at either flat out or around 4000rpm, no problems. total run time about 20 minutes. I'll fish a are… read more
Jeff G.
Jeff G.
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I have a 1996 Merc 250 efi. It has been gone thru twice to
I have a 1996 Merc 250 efi. It has been gone thru twice to eliminate an overheating problem..Engine water pressure never exceeds 5 psi. It only overheats at upwards of 2500 rpm. Thermostats and impell… read more
Whitecap36
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What are the causes for alarm buzzer Contant alarm but resets
What are the causes for alarm buzzer? Contant alarm but resets quickly, runs at moderate speed usually about five minutes before alarm, turn off for a few minutes and reset.… read more
Jeff G.
Jeff G.
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I have a 1999 250 hp Mercury outboard that the cylinder heads
I have a 1999 250 hp Mercury outboard that the cylinder heads are two different temps. I replaced the thermostat on both side and hand tested it. One is warm and the other is hot(can keep hand on it f… read more
Jeff G.
Jeff G.
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I there, I have a 82, V4, 90hp, Evinrude with a overheating
I there, I have a 82, V4, 90hp, Evinrude with a overheating problem in the right hand cyclinder bank, as viewed from the rear. So far I have removed the head, the restrictors are in place, replaced ga… read more
Jeff G.
Jeff G.
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my water pressure gauge is showing pressure but no water is ...
my water pressure gauge is showing pressure but no water is flowing out the indicator hole… read more
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