Mick
Thank you so much for help and assistance, drive restored!! Now to attack the deck reconstruction, hope Ive kept all the parts !! Thanks so much ..common sense in a world of AI slop.
Do you have the spare parts list for the cutting deck ? cheers

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Quote from: Mick on June 07, 2026, 03:42:06 AMHi, and welcome to TGMForum.

The clicking you get from the starter on a B&S InStart is usually caused by a faulty wiring harness.  They modified them to cure this very problem. There's a few posts on here regarding this issue, and I've left a couple of example links below.

https://thegardenmachineryforum.co.uk/index.php?topic=545.0
https://thegardenmachineryforum.co.uk/index.php?topic=926.0

Regarding the cable issue, I'm not very familiar with this actual machine, do you have a model number for it?

Hi,I'm one of the posts on here regarding the clicking on a Briggs 675is InStart. I've replaced the wiring harness and I'm still getting the clicking and engine jamming. Anyone have any other ideas or am I just missing something. Cheers [/quote]

I have a Hyundai HYM460SPE petrol lawnmower.

The linkage from the Handlebar lever to the throttle (although intact) does not seem to operate the carburettor butterfly correctly.

I need a picture(s) from someone with a working HYM460 (or HYM430 or similar) of the throttle and governor linkages/springs so I can adjust mine accordingly.

Many Thanks . . . .

Stuart

The engine is sorted. I was overthinking it. Just needed a smear of sealant on the gasket as there was air being sucked in.

As for the deck fittings, my guess at the orientation of the hanging brackets was as correct as it could be. Any re-position by even 1/2 inch in any direction would mean the grass collector would not fit.

Although the belt measured the correct OD, it had 'thinned' out sufficiently over the years such that it was seating deeper into the V pulleys than it should have, thereby giving too much slack. The new belt was noticably wider and sat less deeply in the pulleys and worked perfectly.

My efforts to shoe horn the wrong size tubes (left over from other projects) into the front (very poor condition) 12-5.00-4 tyres was a failure. The tubes were way oversize and scrunched up inside the tyre and this caused pinch points that developed pin holes. New correct tubes are on the way. Still way cheaper than new tyres.

Only problem left to overcome is that I mulch most of the time, rather than collecting the cuttings. I don't have a mulch setup for this mower. Need to bodge something together.

All told I'm into this project for about £90 - £100. now, plus loads of work. Probably not worth it for most people, and if I was paying somebody to do this, or looking for a sell-on and some profit, it would have been a non starter.

So, I've ended up with a very rusty, very old, but still fairly solid and very capable sit-on for £100 and some elbow grease, and I've leaned a lot.

Compare this with the previous sit-on I fixed up for my son.. a Mountfield 827H, again for a total cost of about £100, he definately go the better deal!

Thanks Mick, I cant find any other than a new cassette at £330, shame to scrap a good machine because greedy manufacturers demands ridiculous prices for parts.

Quote from: Ropi Jo on June 29, 2026, 02:02:17 PMHi Mick.

I used to live in Essex.

Can you elaborate on the decompressor please?

Do you mean the decompress for starting to momentatiliy open a valve?

You used to live in Essex, sounds like you had a luck escape. lol..

Re: The decomp. yes the compression release that lift's a valve slightly on start up. If the revs drop too low while idling  it can suddenly kick in.

Hi Mick.

I used to live in Essex.

Can you elaborate on the decompressor please?

Do you mean the decompress for starting to momentarily open a valve?

If so, that is a result of the revs drop, not the cause of the revs drop, I believe.

The revs dropping happens at higher speeds as well.

So I'm still looking the cause of the revs dipping. And there's not much other than the carb.

If I'm honest I try not to go down the pressure washer Rabbit hole, and avoid them like the plague. The cheaper ones will use a very cheaply made pump imo, and even the more expensive stuff isn't made like it used to be.  Gone are the days of using brass, bronze and ceramic parts which can withstand the conditions. 

They are something that needs to be set up and used on a regular basis, don't like being stored away after use because they corrode, and don't like being moved about etc. 

I could be wrong, but if you can find parts for the cheap pumps the parts will probably cost more than a whole pump.

Hi, and welcome to TGMForum.

To be honest it's unusual to hear the governor make a clicking sound,  The thing you hear commonly is the decompressor kicking in especially if the revs drop below a certain point at idle speed, The decomp will kick in and the engine will run lumpy. I'm wondering if this is what you're hearing.