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 merc losing power
#681969
02/21/06 01:12 AM
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Joined: Oct 2004
Posts: 460
home_built
OP
Angler
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OP
Angler
Joined: Oct 2004
Posts: 460 |
I have a 79 merc 90 hp inline 6, when I am running at wot, it will lose power and fall on its face. if I don't go to full throttle it will run all day with no problem. The ignition system is new, the timing is correct. the only thing I did notice is that after it loses power the primer bulb is almost empty (soft).
Any ideas??
The worst times fishing are still better than the best time thinking about it.
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 Re: merc losing power
#681970
02/21/06 11:40 AM
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Joined: Oct 2004
Posts: 1,258
Bullet Driver
Extreme Angler
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Extreme Angler
Joined: Oct 2004
Posts: 1,258 |
might either be the bulb or your pump, might check them out
  "When all else fails, use a Grenade!"
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Re: merc losing power
#681971
02/21/06 03:48 PM
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Joined: Feb 2005
Posts: 296
Ranger391
Angler
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Angler
Joined: Feb 2005
Posts: 296 |
I would run it on a 6 gallon test tank and see what happens,if it runs good then the problem is in the fuel line or vent in the tank or a restriction in the pickup tube or the check valve.Has the fuel pump been rebuilt,if it hasnt then it needs to be,if it still has the rubber check valves it needs the mylar check valves installed.
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Re: merc losing power
#681972
02/24/06 03:21 AM
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Joined: Jan 2001
Posts: 1,841
molossusri
Extreme Angler
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Extreme Angler
Joined: Jan 2001
Posts: 1,841 |
Check and see if you don't have an air leak on the tubeing near the primer bulb. A small pin hole will cause this to happen.
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Re: merc losing power
#681973
02/24/06 04:00 AM
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Joined: Jan 2004
Posts: 3,744
Ranger-188-2007
TFF Team Angler
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TFF Team Angler
Joined: Jan 2004
Posts: 3,744 |
The diafram [sp] could have a pin hole in it. Or your stater could be grounding out.
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