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Briggs Instart engines. @BriggsStratton

Started by Mick, May 04, 2019, 09:48:39 AM

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Mick

Had four machines in a week all with Briggs Instart engines, and all but one with the same, known electric start fault. 

The fourth one having a faulty decompressor and that causing the battery to have a fit, and shut down. This was on a brand new Harrier 56 which was two days old, and used for the first time.

This system has been out for a while, but it's strange we have all these at the same time, I've a feeling there might be more to come.
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Mick

Seems to have died down a bit now, only had one more with the electric start problem, but that was caused by a bent OPC switch bracket, not sure if it was bent before it was sold, or after, but it was so bent the can that operates the micro switch was missing it completely.

What I am getting is a load of choke problems on these new engines, especially on the Harriers for some reason.  But that's another topic.
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GardenKit

I have had a few problems too with the Instart, nothing major but still annoying nonetheless.
The most common problem is a lack of continuity in the circuit due to the terminals in the loom multiblock connectors becoming loose (from vibration). A modified is available
to cure this on older machines and is fitted as standard to new ones.
Alternatively the terminals can be "squeezed" a bit tighter with some thin pliers as a temporary cure.
The block in question is the black one under the engine cowl which connects the battery tray to the engine loom, very easy to access once the cowl is lifted.

Another issue I have had is that the battery can jiggle its way out and lose contact with the pins. I have just slightly tweaked the male pins in the tray, angling them very slightly. The battery then makes firmer contact and seems to stay in place.

Mick

I haven't managed to get my hands on a replacement loom to this day, last thing I was told they were still on back order, so I've just been crimping up the terminals, and not had them back. 

Must say the battery moving isn't something I've come across yet though, I'll keep my eyes peeled for that one. Thanks for the heads up..  ;)
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Mick

Got another one of these to do tomorrow.   ::)
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GardenKit

Quote from: Mick on July 09, 2019, 07:24:15 AM
I haven't managed to get my hands on a replacement loom to this day, last thing I was told they were still on back order, so I've just been crimping up the terminals, and not had them back. 

Must say the battery moving isn't something I've come across yet though, I'll keep my eyes peeled for that one. Thanks for the heads up..  ;)

The replacement looms have been coming through in small quantities, I have a couple on the shelf.

The battery moving may possibly be isolated to the GGP machines with the AV engine mounts, as the engine does shake about a little. The picture shows the slight 'tweak' I give the terminals and the tool I use to do it. The two on the left are tweaked, the one on the right is still to do. Just be gentle....very, very gentle!

Mick

Yep the engine on rubbers like that would have a influence on that problem without a doubt.  Stiga Multiclip or similar the engine does jump about a fair bit, on start up and stop.  I've only ever serviced them, but not actually cut grass with one, so not sure if they jump about much when cutting.

Thanks again for the heads up.  :tup:
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