Quote from: Mick on June 27, 2026, 01:04:26 PMIf you remove the spark plug does it feel ok when turning by hand?  The InStart engines are known for making a strange noise almost like the starter is trying to knock the engine around, and that's caused by a faulty wiring harness on the engine.

Everything mechanical seems fine except after trying to start it several times it can sometimes jam the starter motor cog. I'll look into the getting a wiring harness. Cheers for the reply.

Quote from: NigelJBlake on June 27, 2026, 12:39:23 PMHi all, I've got a Briggs and Stratton 675is engine on my mower and when I push the button to start it it's almost like the engine fires then jams. Does anyone have any idea of what's going on or a remedy. I've bought plenty of non runners in the past to fix up and move on but never encountered this. I've already checked the clearances on valves, coil even spark plug and had the sump off and checked the timing marks. Hopefully someone knows. Cheers

If you remove the spark plug does it feel ok when turning by hand?  The InStart engines are known for making a strange noise almost like the starter is trying to knock the engine around, and that's caused by a faulty wiring harness on the engine.

Hi, and welcome to TGMForum.

I'm thinking the only way you can go now is to find a universal throttle control cable.  They used to make some identical to the one in your image but I can no longer find them.  So your going to either see if your local mower repair shop has a equivalent universal cable, or find one on the web. 

Bare in mind some only have minimal travel, so might not hit both choke and stop positions. And some are reversed, so choke and stop will be in the wrong places. 

If I find one on the web I'll leave a link. 

Hi all, I've got a Briggs and Stratton 675is engine on my mower and when I push the button to start it it's almost like the engine fires then jams. Does anyone have any idea of what's going on or a remedy. I've bought plenty of non runners in the past to fix up and move on but never encountered this. I've already checked the clearances on valves, coil even spark plug and had the sump off and checked the timing marks. Hopefully someone knows. Cheers

Quote from: NigelJBlake on June 27, 2026, 10:27:17 AMor have I just accomplished it.

You have indeed.    Welcome to TGMForum.

I have an old Hayter Harrier 48, type 220. I need to replace the Throttle Control and Cable (Part number 219101) As far as I can see, this is obsolete, and no longer available. Does any know if it can be swopped out for a replacement from a newer model please?

Hi,I'm new to this site and I've been trying for a week to try and see how to put a question on here. Could someone give me some guidance please or have I just accomplished it. Cheers

Recently acquired a 2021 1530H with a mulching kit fitted . After 4 05 changes to different lawns involving taking out and putting in the mulching plug , it blades on start up destroyed the plug !

All I have discovere is after purchasing a new plug and inserting it It wouldnt drop in were it should , so it was catching the rear top edge of the shoot nearest the blade. There is a bracket clamped on the raise and lowering bar bolted to the bar under the deck cover between the foot steps . This bracket sits on the shoot when the deck is in the raised position and it may have revolved round from its original setting (put in there by the machinery supplier prior to me buying), So I slackened it and turned it towards the shoot for extra pressure.
The plug now goes in rather awkardly but still doesnt explain why the blades made contact and destroyed the original one .
Has anyone got some knowledge of this please?

Hi Andy, and welcome to TGMForum.

When you say two screw carb, you mean it has screw in the very bottom and one on the side + the idle speed screw?

If yes, then to set the carb, run at hight speed on the control, unscrew the bottom screw until it starts running rich like the choke is on, then slowly turn the screw in until it evens out and runs as smooth as you can get it. Then you can set the idle if needed, again turning side screw in or out until it runs smooth.

The operating speed shouldn't be too high on a cylinder mower, just set it to a suitable walking pace, it shouldn't need to be flat out.

Hi I'm quite the novice in mowers and I have got the fascination in getting my lawn perfect, anyway I bought myself a qualcast 35s to renovate and make good again everything is good except I struggle to set the carb for the idle I bought a aftermarket two screw carb to skip cleaning the original carb, in idle is fine and when I move the lever to the rabbit / higher rpm it runs a little at higher speed then The governor kicks in and shuts the paddle killing the engine, do you have any tips for me and am I overthinking the speed control is this used to control speed or should you always run the lawn mower in high rpm when in use