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Dec 30th, 2023
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 1985 Merc 175 - port side not firing at idle
#9599520
12/28/13 10:25 PM
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Joined: Apr 2004
Posts: 14,082
Stump jumper
OP
TFF Guru
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OP
TFF Guru
Joined: Apr 2004
Posts: 14,082 |
Idling low and surging. WOT and acceleration are fine along with mid-range. I tested at the house and 2, 4, & 6 have no fire at idle. I am thinking power pack since it is the whole bank.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9600394
12/29/13 04:35 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 |
Could be stator or trigger also.
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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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9600659
12/29/13 01:01 PM
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Joined: Apr 2004
Posts: 14,082
Stump jumper
OP
TFF Guru
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OP
TFF Guru
Joined: Apr 2004
Posts: 14,082 |
Gary, I was also thinking trigger since it is original. I had a stator go out and it just dropped my RPMs to 2000 max. Do stators have a high / low side?
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9601042
12/29/13 04:24 PM
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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 |
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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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9603478
12/30/13 04:16 AM
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Joined: Jan 2013
Posts: 59
Tnamarine
Outdoorsman
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Outdoorsman
Joined: Jan 2013
Posts: 59 |
Switch box is bad trigger controls 2 xylinders 1 on each side the switch boxes control each bank so if you have for on all three on stbd and non on port or vise versa switchbox is bad and I would rec changing them both any questions feel free to give me a call
Tna marine
10758 us hwy 80
Forney tx 75126
2145184679
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9608252
12/31/13 10:17 PM
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Joined: Apr 2004
Posts: 14,082
Stump jumper
OP
TFF Guru
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OP
TFF Guru
Joined: Apr 2004
Posts: 14,082 |
Looks like a stator. Side that is not firing at idle tested at 10.1 ohms and the other was 4.5.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9612862
01/02/14 02:53 PM
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Joined: Jan 2013
Posts: 59
Tnamarine
Outdoorsman
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Outdoorsman
Joined: Jan 2013
Posts: 59 |
If it is still connected is reading resistance of switch box as well
Tna marine
10758 us hwy 80
Forney tx 75126
2145184679
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Tnamarine]
#9613557
01/02/14 06:43 PM
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Joined: Apr 2004
Posts: 14,082
Stump jumper
OP
TFF Guru
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OP
TFF Guru
Joined: Apr 2004
Posts: 14,082 |
I disconnected the leads from the stator.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: 1985 Merc 175 - port side not firing at idle
[Re: Stump jumper]
#9636691
01/10/14 11:07 PM
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Joined: Apr 2004
Posts: 14,082
Stump jumper
OP
TFF Guru
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OP
TFF Guru
Joined: Apr 2004
Posts: 14,082 |
Update, stator killed all fire to outer box. Box itself was dead on #4. New stator and new box and I now have big time fire.
2200 Bay Champ/200 Mercury Optimax
2017 Tundra TSS 4x4 Crewmax 5.7L
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