Need help?


Search OutdoorKing by entering Key Words Below



Who's Online Now
0 members (), 185 guests, and 195 robots.
Key: Admin, Global Mod, Mod
Online Spare Parts


Online Store


Newest Topics
What Colour Was the Old Power Torque Mufflers?
by Jeffery - 16/06/24 08:30 AM
Victa Pro 550 Mulch
by Jeffery - 26/05/24 07:43 PM
Husqvarna Rancher 50 Oil Vent
by MowingManiac - 18/05/24 11:23 AM
Victa: The Triplets
by Polybus - 13/05/14 08:28 PM
Topic Replies
What Colour Was the Old Power Torque Mufflers?
by maxwestern - 17/06/24 07:40 PM
Husqvarna Rancher 50 Oil Vent
by MowingManiac - 07/06/24 01:05 PM
Victa Pro 550 Mulch
by Bruce - 03/06/24 11:01 PM
Victa: The Triplets
by maxwestern - 30/05/24 10:40 PM
Previous Thread
Next Thread
Print Thread
Rate Thread
Hop To
#113431 27/11/21 05:12 PM
Joined: Jan 2012
Posts: 106
Apprentice level 2
*
Hi Guys

I've have a briggs 8hp on a rover colt that I bought a few weeks ago.

I've replaced the coil, carby and given it a freshen up but I can't get it to run smoothly. It almost runs as though it starves for fuel intermittently. I've had the same issue with both the new and old carby. I've gotten it to slightly improve with giving it a tune but it does continue. Some of the head bolts weren't all that tight which I only noticed the other day but I'm not sure if that would have any bearing on it.

It does seem like after 5 or 10 minutes of mowing it seems to gradually get smoother. The governed appears to hold steady it just sounds almost like I'm sticking my hand over the air intake about every 5 or 10 seconds.

Cheers

Joined: Sep 2015
Posts: 2,052
Likes: 146
SENIOR TECHNICIAN & HISTORIAN
Hi gizmo1993

https://www.lawnmowerfixed.com/mower-engine-surging/

The most common reasons for a surging
Bad Fuel
Bad spark plug
Dirty / faulty carburetor
Fuel filter blocked
Fuel tank blocked
Fuel line blocked
Gasket vacuum leak
Manifold vacuum leak
Governor control fault


You can apply a half choke with the engine running if you have a motor without a choke holding a finger half over
the carby intake will do once the air filter is removed.

If the engine now runs without surging – Gas starvation is the likely fault. If it runs just the same .A vacuum leak is the more likely fault.


Cheers
Max.


Moderated by  bigted, Bruce, CyberJack, Gadge, Mr Davis 

Link Copied to Clipboard
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Newest Members
TheGreyRider, viv5038, big hello aye, JACWEL, Mike Horsman
16,811 Registered Users
Forum Statistics
Forums145
Topics12,719
Posts104,666
Members16,812
Most Online2,545
Dec 23rd, 2019
OutdoorKing Showcase
20 Bucks from FB Marketplace
20 Bucks from FB Marketplace
by Return Rider, February 20
Victa Cortina 2 Shed Find
Victa Cortina 2 Shed Find
by Return Rider, January 25
My Rover Baron 45
My Rover Baron 45
by Maxwell_Rover_Baron, April 16
SHOWCASE - Precision Mowers - 2021
SHOWCASE - Precision Mowers - 2021
by CyberJack, April 14
SHOWCASE – Atco Rotary – Paul C - 2020
SHOWCASE – Atco Rotary – Paul C - 2020
by CyberJack, December 28
HOME |CONTACT US
Powered by UBB.threads™ PHP Forum Software 7.7.5
(Release build 20201027)
Responsive Width:

PHP: 7.4.33 Page Time: 0.017s Queries: 19 (0.013s) Memory: 0.6639 MB (Peak: 0.6857 MB) Data Comp: Zlib Server Time: 2024-06-17 20:54:08 UTC
Valid HTML 5 and Valid CSS