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83 Mercury 90 HP (tower of power) fuel pump question
#12371510
08/03/17 11:20 PM
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Joined: Mar 2009
Posts: 555
Austintatious
OP
Pro Angler
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OP
Pro Angler
Joined: Mar 2009
Posts: 555 |
Hi everyone. My 83 TOP seems to be running really well, however when i stop and fish for a while, when I go to start it I find that the fuel has drained out of the line back into the tank and I have to pump the bulb again.
I have purchased a 5.oo one way valve to put in line but someone told me it is likely the fuel diaphragm leaking. I hunted down a kit but I also noticed a check valve listed among the parts on the exploded fuel pump view.
Does anyone know which of these I need? the diaphragm or the one way valve?
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12371997
08/04/17 06:27 AM
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Joined: Jan 2013
Posts: 92
CraZyNOTRT
Outdoorsman
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Outdoorsman
Joined: Jan 2013
Posts: 92 |
need to post your model number or serial to be sure. But if your going to rebuild the pump get the check valve assembly, which usually includes the diaphragms in the kit.
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12372128
08/04/17 01:13 PM
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Joined: Mar 2009
Posts: 555
Austintatious
OP
Pro Angler
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OP
Pro Angler
Joined: Mar 2009
Posts: 555 |
the serial number is 6247291
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12372590
08/04/17 07:50 PM
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Joined: Jan 2005
Posts: 7,490
redchevy
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 7,490 |
If it is draining back to the tank there is a problem with your primer bulb also, it should act as a one way valve also.
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: redchevy]
#12376259
08/07/17 07:28 PM
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Joined: Mar 2009
Posts: 555
Austintatious
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OP
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Posts: 555 |
If it is draining back to the tank there is a problem with your primer bulb also, it should act as a one way valve also. I thought the same thing and replaced the bulb. Didn't fix it. I am talking after an hour or more in one spot this happens.
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12377201
08/08/17 01:56 PM
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Joined: Dec 2014
Posts: 1,665
Muzzlebrake
Extreme Angler
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Extreme Angler
Joined: Dec 2014
Posts: 1,665 |
Are you tilting the motor forward when you stop to fish? If so the carbs will drain themselves out because the floats and float bowl is no longer sitting level.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12377403
08/08/17 04:28 PM
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Joined: Dec 2013
Posts: 459
PlanoPaul
Angler
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Angler
Joined: Dec 2013
Posts: 459 |
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Muzzlebrake]
#12378349
08/09/17 01:58 AM
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Joined: Mar 2009
Posts: 555
Austintatious
OP
Pro Angler
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OP
Pro Angler
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Posts: 555 |
Are you tilting the motor forward when you stop to fish? If so the carbs will drain themselves out because the floats and float bowl is no longer sitting level. No, I do not do this.
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12381407
08/11/17 03:16 AM
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Joined: Dec 2006
Posts: 509
BCB
Pro Angler
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Pro Angler
Joined: Dec 2006
Posts: 509 |
The fuel pumps are simple and the diaphragms are hard to come by for a tower of power. Great motors and they last a long time on the older ones.
BCB
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12381491
08/11/17 04:20 AM
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Joined: Feb 2006
Posts: 3,773
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,773 |
I have had new primer bulbs that were bad a couple times, also some of them only have 1 valve to keep fuel from returning to the tank, the better ones have 2 and work better and last longer.
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: 83 Mercury 90 HP (tower of power) fuel pump question
[Re: Austintatious]
#12381556
08/11/17 11:39 AM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Any slight fuel hose leak between the bulb and the carbs will allow the bleed down. I first eliminate the quick connector for the fuel hose.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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