B&S 550ex won't rev up

That just adjusts the top no load speed on these fixed speed units.

Speedy now you got one running correctly use subbing to pinpoint the problems with the other engines. Got to be a reason why the governor spring isn't opening the throttle. May this is a binding problem with the throttle shaft. I have seen plastic shafts to swell and bind. A little sanding on the shaft pivot points usually free them up.

Entire Thread
Subject	Posted By	Posted
B&S 550ex won't rev up	speedy	09/01/19 09:04 AM
Re: B&S 550ex won't rev up	Tyler	09/01/19 09:46 AM
Re: B&S 550ex won't rev up	AVB	09/01/19 12:28 PM
Re: B&S 550ex won't rev up	speedy	09/01/19 08:19 PM
Re: B&S 550ex won't rev up	NormK	09/01/19 09:03 PM
Re: B&S 550ex won't rev up	Mowerfreak	09/01/19 09:19 PM
Re: B&S 550ex won't rev up	NormK	09/01/19 09:36 PM
Re: B&S 550ex won't rev up	Mowerfreak	09/01/19 09:50 PM
Re: B&S 550ex won't rev up	NormK	09/01/19 10:02 PM
Re: B&S 550ex won't rev up	Mowerfreak	09/01/19 11:53 PM
Re: B&S 550ex won't rev up	NormK	10/01/19 01:05 AM
Re: B&S 550ex won't rev up	speedy	10/01/19 08:27 AM
Re: B&S 550ex won't rev up	NormK	10/01/19 09:16 AM
Re: B&S 550ex won't rev up	bigted	10/01/19 01:08 PM
Re: B&S 550ex won't rev up	speedy	14/01/19 07:05 AM
Re: B&S 550ex won't rev up	AVB	14/01/19 04:12 PM
Re: B&S 550ex won't rev up	NormK	14/01/19 10:10 PM
Re: B&S 550ex won't rev up	NormK	15/01/19 04:31 AM
Re: B&S 550ex won't rev up	speedy	15/01/19 07:13 AM
Re: B&S 550ex won't rev up	Tyler	15/01/19 07:54 AM
Re: B&S 550ex won't rev up	NormK	15/01/19 07:39 AM
Re: B&S 550ex won't rev up	NormK	15/01/19 08:40 AM
Re: B&S 550ex won't rev up	AVB	15/01/19 03:24 PM
Re: B&S 550ex won't rev up	speedy	15/01/19 09:07 PM
Re: B&S 550ex won't rev up	NormK	15/01/19 09:55 PM
Re: B&S 550ex won't rev up	AVB	15/01/19 11:40 PM
Re: B&S 550ex won't rev up	Mowerfreak	16/01/19 02:54 AM
Re: B&S 550ex won't rev up	speedy	16/01/19 06:56 AM
Re: B&S 550ex won't rev up	speedy	18/01/19 08:07 AM
Re: B&S 550ex won't rev up	NormK	18/01/19 08:40 AM
Re: B&S 550ex won't rev up	speedy	18/01/19 08:07 PM
Re: B&S 550ex won't rev up	speedy	22/01/19 07:05 AM
Re: B&S 550ex won't rev up	NormK	22/01/19 07:26 AM
Re: B&S 550ex won't rev up	NormK	25/01/19 10:31 PM
Re: B&S 550ex won't rev up	speedy	27/01/19 08:02 AM
Re: B&S 550ex won't rev up	AVB	27/01/19 03:34 PM
Re: B&S 550ex won't rev up	Mowerfreak	27/01/19 10:08 AM
Re: B&S 550ex won't rev up	NormK	27/01/19 09:20 PM
Re: B&S 550ex won't rev up	thecarbymaster	31/01/19 12:09 PM
Re: B&S 550ex won't rev up	Tyler	02/02/19 10:14 AM
Re: B&S 550ex won't rev up	speedy	02/02/19 08:24 PM
Re: B&S 550ex won't rev up	NormK	02/02/19 10:27 PM
Re: B&S 550ex won't rev up	speedy	04/02/19 10:12 AM
Re: B&S 550ex won't rev up	NormK	04/02/19 10:38 AM
Re: B&S 550ex won't rev up	Tyler	04/02/19 01:14 PM
Re: B&S 550ex won't rev up	speedy	06/02/19 02:21 AM
Re: B&S 550ex won't rev up	speedy	06/02/19 03:29 AM
Re: B&S 550ex won't rev up	NormK	06/02/19 03:49 AM
Re: B&S 550ex won't rev up	AVB	06/02/19 03:26 PM
Re: B&S 550ex won't rev up	speedy	10/02/19 08:45 PM
Re: B&S 550ex won't rev up	AVB	10/02/19 09:43 PM
Re: B&S 550ex won't rev up	NormK	10/02/19 09:57 PM
Re: B&S 550ex won't rev up	NormK	13/02/19 07:49 PM
Re: B&S 550ex won't rev up	speedy	22/02/19 01:40 AM
Re: B&S 550ex won't rev up	NormK	22/02/19 07:34 AM
Re: B&S 550ex won't rev up	speedy	22/02/19 09:36 AM
Re: B&S 550ex won't rev up	speedy	20/06/20 10:35 PM
Re: B&S 550ex won't rev up	Mowerfreak	21/06/20 02:29 AM