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6.2 Mercury ,no fuel pressure, no power to pumps.

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6.2 Mercury ,no fuel pressure, no power to pumps.

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Old 08-11-2013 | 04:13 PM
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Default 6.2 Mercury ,no fuel pressure, no power to pumps.

Starboard engine quit yesterday at WOT, that was fun, Restarted but would only run a few minutes with limited RPM. Got her home have no fuel pressure and no power to pumps. Good engine has power on one of the terminals with key on. Before I start pulling apart does anyone know if there is a breaker somewhere. Whire to pumos goes into main harness.Engine will run if a small amount of fuel is poured into it. Thanks Tim
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Old 08-11-2013 | 04:22 PM
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Oh and just to be clear I was running in lake Erie so I was getting banged around a little. So I could have knocked something loose.
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Old 08-12-2013 | 05:55 AM
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Did you check the micro fuse for the pump?
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Old 08-12-2013 | 07:51 AM
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Originally Posted by Expensive Date
Starboard engine quit yesterday at WOT, that was fun, Restarted but would only run a few minutes with limited RPM. Got her home have no fuel pressure and no power to pumps. Good engine has power on one of the terminals with key on. Before I start pulling apart does anyone know if there is a breaker somewhere. Whire to pumos goes into main harness.Engine will run if a small amount of fuel is poured into it. Thanks Tim
You have 2 fuel pumps.....one is a lift pump (taking it out of the tank) and the other is the fuel pump on the motor. I had 6.2's and the fuel pumps were an issue as well as that distributor on the back of the motor (sun pad would drain right on top of the distributor!). Motors were great for the first 250 hours, then when the warranty work started it seemed like they were non stop trouble after that.
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Old 08-12-2013 | 12:10 PM
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Check the pump relay on the motor... one wire will be hot all the time. one wire will get hot with the key. one wire will be the power to the pump . one wire is ground.

You will have a couple relays together... 2 or 3 I can remember
Unplug 1 relay at a time on the good motor to find the right one if you need to figure out what relay to look at

Last edited by jwp; 08-12-2013 at 12:18 PM.
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Old 08-12-2013 | 01:07 PM
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Fuel pump relay and or cannon plug connection. Will your motor crank over at least or is all of that dead to ?
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Old 08-12-2013 | 05:42 PM
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Originally Posted by scarabman
Did you check the micro fuse for the pump?
No were is it? Still getting caught up from bieng away this weekend so really have not spent too much time on it. Hopefully Tue night.
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Old 08-12-2013 | 05:43 PM
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Originally Posted by jwp
Check the pump relay on the motor... one wire will be hot all the time. one wire will get hot with the key. one wire will be the power to the pump . one wire is ground.

You will have a couple relays together... 2 or 3 I can remember
Unplug 1 relay at a time on the good motor to find the right one if you need to figure out what relay to look at

Thats actually my first try,just can't do it tonight.
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Old 08-12-2013 | 05:44 PM
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Cranks, and runs if I sqrirt gas in it.


Thanks for all the help will advise.
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Old 08-12-2013 | 06:10 PM
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The fuse for the fuel pump is located next to the ECM555 . There is three black fuse holders.
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