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Dec 30th, 2023
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 175 hp. mercury won;t idle
#2340263
06/06/08 01:28 PM
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Joined: Jul 2005
Posts: 1,887
lakeman
OP
Extreme Angler
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OP
Extreme Angler
Joined: Jul 2005
Posts: 1,887 |
i have a 1985 mecury v6 175 hp,I get it under 1100 it will just die, it won't idle under 1100 rpm, just die's out, won't start in idle position either, I have to give the throttle about half way open to start the motor, Carb's have been gone thru and seen no problem there at all, any help would be greatly appreciated, thanks, jerry R.
happy fishing,
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Re: 175 hp. mercury won;t idle
[Re: lakeman]
#2340663
06/06/08 03:01 PM
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Joined: Aug 2006
Posts: 7,182
steve@S2Marine
TFF Celebrity
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TFF Celebrity
Joined: Aug 2006
Posts: 7,182 |
hang tight man.
OPTI will be along soon. or some of the other tech's will be here shortly.
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Re: 175 hp. mercury won;t idle
[Re: steve@S2Marine]
#2341945
06/06/08 08:47 PM
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Joined: May 2007
Posts: 463
Cast Net
Angler
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Angler
Joined: May 2007
Posts: 463 |
Have you rebuilt the diaphragm fuel pump lately? #1 culprit of Mercs that are cranky to get started and no idle. At the same time you rebuild the pump, there should be an inline filter between the pump and the carbs that should also be replaced. Just follow the line off the pump and you will see it if it is there on yours. Also I would suggest pulling all the plugs and hit them with DeepCreep, let it sit overnight and start the next morning. A lot of times, there can be enough carbon build up to effect starting and low speed performance. The I would run several tankfuls of SeaFoam mixed at the proper rate.
Rebuilding the pump is easy however do not use the Clymer manual as a reference. On this the pics show the diaphragms in the wrong sequence. Use the instructions enclosed with the kit.
My 150's would run just fine at WOT. But trying to get them started on a warm start required a fast idle of around 1000rpm or more and then when the controls were brought back to neutral they would stall out unless you jacked it back into gear before you lost the rpms. Not good for the lower unit.
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Re: 175 hp. mercury won;t idle
[Re: Cast Net]
#2342973
06/07/08 07:34 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 |
Seen several early Mercs, that the idle advance moduel goes out causing this idle problem. Disconnect the red and the white wires at the ignition box then adjust the idle advance till tach shows 1000 rpm on the hose. Try this and we will go from their.
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: 175 hp. mercury won;t idle
[Re: gary purdy]
#2344923
06/08/08 08:12 AM
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Joined: Jul 2005
Posts: 1,887
lakeman
OP
Extreme Angler
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OP
Extreme Angler
Joined: Jul 2005
Posts: 1,887 |
Thanks for the info fellows, am tied up over the weekend, will check more into come first of week, Jerry R.
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Re: 175 hp. mercury won;t idle
[Re: lakeman]
#2346241
06/08/08 07:08 PM
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Joined: Nov 2005
Posts: 4,061
Mike Halfmann the boatmann
TFF Team Angler
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TFF Team Angler
Joined: Nov 2005
Posts: 4,061 |
Besides the idle stabilizer, raise the floats inthe carbs until they almost flood. Makes life a lot easier for those early mercs.........
mike halfmann
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Re: 175 hp. mercury won;t idle
[Re: lakeman]
#2346244
06/08/08 07:08 PM
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Joined: Nov 2005
Posts: 4,061
Mike Halfmann the boatmann
TFF Team Angler
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TFF Team Angler
Joined: Nov 2005
Posts: 4,061 |
Besides the idle stabilizer, raise the floats inthe carbs until they almost flood. Makes life a lot easier for those early mercs.........
mike halfmann
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