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Hi Seth.
Very hard to be certain from your pictures but it looks to me like the lawn you are mowing is fairly mossy and with probably a fair amount of thatch. Basically there is so much junk in the lawn already that there just isn't room for you to push more matter into it. You are seeing all the material that wont push into the lawn forming a windrow at the rear of the machine. The usual problem with mulching is moisture. In your pictures, the underside of the machine is clearly showing no build-up, and the conditions are bone dry, so it isn't that. Pro 46 is a pretty good mulcher - but will show a little windrow just left of centre if too much is pushed through it. I would probably collect this lawn for a couple of cuts and then try mulching again.
Sorry my fault for not expanding in the original post. But the mower does it on all sorts of lawns and at all cutting heights. I have previously mulched extensively with a Stiga so I am familar with the mulching process.
I merely just bothered to take photos today as it was the only job I was doing, and I was hoping that after the poor mulching earlier in the week it would work on this lawn.
Is that a dedicated mulching blade or a '3 in 1' blade?
Conditions currently aren't great for mulching as the grass is very stringy and doesn't mince up very finely.
It's a mulching blade, came as a kit with the plug. No issues in these conditions before, and as I said I have cut other grass to this lawn with a similar effect.
it's not like im trying to mulch much grass at all. Using again today in some longer grass and there was a similar finish to this. So my theory is still there is something missing from the bottom of the mower/plug as mulched what must have been 3x the volume of grass and had a similar effect.
Seems like grass is falling down in a gap between the plug and the blade, but in the centre of the mower. Previous mulch mowers would spit any unmulched grass out the left hand side where the deck is lower rather than bang in the middle of the mower.
Is it because the plug is not the same shape as the hole in the underside of the deck shape? There is effectively a cave for grass to enter into? Other brand plugs are the same contour shape of the entire deck underside ?? so it's all smooth like a ring donut (lol) rather than a ring donut with a chunk bitten out
the grass that enters the cave then falls out every now and then?
Hi,
I had the same problem with mine and gave up mulching with it in the end especially after I added the speed up kit. It seemed to struggle very quickly depsite having the dedicated mulching blade on and leave a poor finish.
Using it some more today, as well as on heavy summer leaf drop and some quite long grass. It still leaves the exact same finish.. a small trail of unmulched grass. Yet mulches a thick layer of lime leaves excellently and mulches up a few inches of growth just the same as next to nothing.