Makita HTR5600 not reving when pointed downwards.

[Nopedigree]

Hi all, after some help please.

Makita HTR5600 starts and ticks over no problem, when the blade is pointed up it will rev as normal but when the blade is lowered it starts bogging down and will cutout when vertical.

Cleaned the air filter, tried with fuel cap lose, applying the choke with no effect. The only thing that does get it reving while pointed down is lightly pressing the primer bulb.

 

Any advice or pointers would be much appreciated.

 

NoPedigree

[spudulike]

Sounds like fuel starvation caused in a certain position. Things to check: -

1) The fuel filter is in a position where it can pick up fuel when the trimmer is pointed down. Check the fuel filter is clean whilst doing this.

2) check the fuel line doesn't have a split in it - it is possible when the trimmer is pointed down, the split is out of the fuel.

3) If number 1&2 don't work, you need to check the carb gauze strainer (screen filter on the image) as it could be full of crud. The image below isn't your carb but may help. Check the flaps (reed valves) are not holed whilst in there.

4) If this doesn't work, it is possible it just needs a tune up. I am not familiar with your machine but generally, these type of barrel carbs are adjusted by taking out a bung on top of the carb barrel  and winding the carb needle up to richen and down to lean so upwards for you. There may be another adjustment on the carb for idle but it may not have one. The idle may need tweaking afterwards.

[Nopedigree]

Thanks for this Spud, I will follow your advice and report back, I maybe some time…😀

 

NoPedigree