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Forum: Engines

06-07-2021, 09:27 AM

Replies: 8

5.0 runs rough and stalls at low idle

Views: 1,826

Posted By jparsons121

Your theory on over rich is valid. Checking fuel...

Your theory on over rich is valid. Checking fuel pressure to be sure it’s in the 4-5 lbs range would would eliminate one potential issue. I still think you have an issue with the fuel level. ...

Forum: Engines

04-14-2021, 11:18 AM

Replies: 8

5.0 runs rough and stalls at low idle

Views: 1,826

Posted By jparsons121

I’m confused. The float drop sets the full open,...

I’m confused. The float drop sets the full open, and float level sets the shutoff point.
Float level Specs call for 9 to 14mm depending on the application and the type of needle (spring loaded or...

Forum: Engines

04-09-2021, 10:13 AM

Replies: 8

5.0 runs rough and stalls at low idle

Views: 1,826

Posted By jparsons121

Dripping fuel is not normal. Sounds like your...

Dripping fuel is not normal.
Sounds like your idle issue is related to an over rich condition as a result of the dripping.

This can happen if the float level is to high or needle/seat are...

Forum: Engines

04-06-2021, 04:55 PM

Replies: 8

5.0 runs rough and stalls at low idle

Views: 1,826

Posted By jparsons121

Have you replaced the fuel/water separating...

Have you replaced the fuel/water separating filter?
My Mercarb s were very particular about water in the fuel.

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