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Honda UMK435

Honda UMK435 Questions & Answers

UMK435U, UMK435L
4.3 from 36 reviews

24 questions from our users

Faranak Danaie

Faranak Danaieasked

UMK435U

what sort of petrol should I use please?

No answers
Oldster

Oldsterasked

UMK435

The line on my machine keeps feeding out so I have way too much line.

No answers
ChrisB

ChrisBasked

UMK435

How easy is it to convert a Honda 435e strimmer to a brushcutter, and what part do I need?

No answers
Brett.H

Brett.Hasked

UMK435U

I have just purchased a UMK 435U Honda Brushcutter, what a great machine.
What sort of oil goes in the gearbox & how do I know how old the model is.
Where do you get the user manual from.
Thanks.

No answers
Mark

Markasked

UMK435U

I have a replacement line head unit but it’s much bigger than the old one.
How do you remove the line head, there is no Allen key like the older units.

1 answer
Lissajous
Lissajous

From memory (been a while), there's a hole you stick a screwdriver or Allen key in to hold the shaft while you unscrew the head. It's usually buried and hidden in grass so you may need to clean things a bit to find it. :-)

MR A

MR Aasked

UMK435

I have 2 Honda UMK435T trimmers. I have had to replace the clutch shoe TD40 in both units and they are less than 8 months old. Why do they wear out so quickly?

1 answer
Subang
Subang

Trimming head speed too slow, causing clutch slippage

Tapan M.

Tapan M.asked

UMK435

Air filter should change after how many days?

1 answer
Subang
Subang

Read the manual. If very dusty or you encounter lots of debri clean it more often

Thambi

Thambiasked

UMK435

how to grease the hub of Honda 435 T brush cutter?

1 answer
F.G.
F.G.

Hi. To my knowledge the bearing and spindle head unit are factory greased and sealed.
My 35 has been used on my small acreage every weekend and for many years.
The head unit still spins smoothly and has no shaft play.
I would think I will wear the motor out first.
I am sure your Honda dealer could effect repairs when and if needed.
For me I will just park it up and buy another Honda.
They are so reliable.

NeilJane

NeilJaneasked

UMK435U

While re assembling the nylon cutting head, I have placed the holder upside down and therefore when I insert the alan key into the cutting head, there is no slot for it to lock into.
How can I remove the cutting head and place the holder the correct way around?

2 answers
Glen B.
Glen B.

Place the holder in a vice and undo the cutting head, or use a pipe wrench on the holder to hold it firm. Remember it is a left hand thread.

NeilJane
NeilJane

Thanks but we have since sorted out the problem.

Alavo

Alavoasked

UMK435

What is the position of choke when working the machine?

1 answer
Jeremy S
Jeremy S

Open once you have got it started from cold.

Saroj

Sarojasked

UMK435

Honda umk 435T brush cutter how much fuel consumption in a hr?

1 answer
Jeremy S
Jeremy S

Depends how hard you are working it. You should get an hour or so out of a tank.

Terry

Terryasked

UMK435

I have honda versatool umc435 i have had problems since day one. machine started on full choke when of choke cuts out. took it back to shop they changed carbretta said it was faulty everything seemed ok but now same thing is happening starts ok on choke from cold but cuts out when choke knocked of. i start it up let it run couple of minutes then knock choke of it cutts out. it will keep working only if i hold throttle and keep the revs up .any thoughts on this?

3 answers
mr aussie
mr aussie

Air filter, buy a new one off fee bay $4

Jeremy S
Jeremy S

Try putting compressed air through the fuel tank filter.

F.G.
F.G.

Sounds like the vent valve on the fuel filler cap is blocked.
Try starting it with the cap loose. If it runs smoothly you would need to air dust the cap or wash it in some petrol.
Cheers.

Trevor H

Trevor Hasked

UMK435

I have a Honda UMK 26 which I cannot find any information on ...I am looking for a primer, gas cap and will probably need more pieces ..anyone got any info on this?

1 answer
Jeremy S
Jeremy S

If you have a local Honda dealer go there. About $6 last time I got one.

Titus

Titusasked

UMK435

UMK 435E
Hello
Managed to get hold of one of these awesome machine after submitting a winning bid at an auction. The choke has been a little sticky, but currently have cleaned a lot of the parts. I will be reassembling the machine parts over the next couple of days after parts have had a chance to dry out. Does anyone know how many gaskets are on this model as I ma considering replacing them.

Regards

John

No answers
Greg

Gregasked

UMK435U

Hi I was brush cutting this morning and for the first time ever my machine cut out. I went to restart it and the chord won't pull out to start? I'm gathering it must be caught up in the gearing somehow. Any ideas for a home fix? Cheers, Greg

1 answer
UltimateConsumer
UltimateConsumer

I believe your motor might be cooked beyond repair. Most likely a lack of oil, or dirty oil. More expensive to fix a seized motor than to buy a new one. Sorry.

Fraser Lox

Fraser Loxasked

UMK435

Why the engine has not enough power to supply when cutting grass, and the engine stop?

3 answers

G'day Fraser, there could be any number of reasons for the engine losing power and stopping, but I always check the easiest (and cheapest) solutions first. In this case they would be the air cleaner and the fuel strainer, both of which you can service yourself (instructions are in the manual).

By the way, my wife complained of something similar one day, it turned out she had just left the choke on. I still give her a hard time about that.

Annie
Annie

I have had the same problem with my Honda brush cutter. Did all the maintenance jobs in the manual but although improved it never fixed it. It is always worse when cutting long or thick grass. It always seemed like it wasn't getting enough air but changing the air filter did not fix it. Loosening off the petrol cap fixed the problem but the cap then fell off with vibration. Yesterday I drilled a hole in the centre of the petrol cap and it has never worked better. I can rev it up as much as I like and it never cuts out. However not really knowing much about engines I wanted to ask if the air was being limited for a reason. What I have done now means that I can cut flat out but will it damage my engine?

JohnS
JohnS

Hi Annie. Had the same issue. That fuel cap is supposed to be vented but the tiny hole blocks up. The engine can't keep sucking fuel (especially when working hard) if there is a vacuum developing in the tank. So yes, you're on the right track. No issue with drilling a hole unless it is so big that junk gets in the fuel.

JULES

JULESasked

UMK435U

Im looking in the manual and cant find nylon line size, can someone tell me the size instead of just a colour please?

4 answers
Patty W
Patty W

The thickness of the line doesn't matter. The length of the line is limited to how much you can loosely roll on - I get about 2.8 metres on each time.

d w
d w

You can use up to 3mm. I use it all the the time. It lasts longer than the thin line. I assume that because you have that model you would be cutting more than grass at times, so use the 2.7/2.8 mm or 3mm and you should be fine

Thunderbolt 1
Thunderbolt 1

I had a quick look through the product manual that came with my trimmer(UMK435) and couldn't find any specification for the thickness of line. That said when I purchased my trimmer I asked about the line thickness and ended up getting a spool of Honda brand line 0.27cm (2.7mm) in thickness This is really good stuff it has a squarish profile with edges on each lobe and cuts really well. I would normally use diamond line orange 0.27(2.7mm) on my sthill and was planning to use it on the Honda but I will probably stick with the Honda stuff there would seem to be very little difference between the 2 in my opinion.The Honda line is white in colour and the diameter is marked on the packaging as 0.27 (2.7mm) line. I can t actually tell you if I got more line on the spool that I would have if using the diamond line I didn't measure it (or have tried it yet on the Honda)The profile shape will actually assist in determining the actual amount of line you can spool but I don't think there would be much difference between these brands when it comes to it. It would only be centimetres if it was different The Honda line is dearer compared to diamond line but the pricing would be under $5.00 per spool in difference. Where you buy it from will also determine price etc. The original line supplied with the Honda( on the cutting head) when I got it was round and thicker and very soft (also white). It was ok but it didn't last too long I remember having the same experience with the original line that came on the sthill when I bought it back in 1995. I use my trimmer in a variety situations e.g. trimming concrete edges, retaining walls, heavy grass, some undergrowth, around poles etc. This diameter of line is a good all-round, from experience though If I were going to do a lot of clearing I would go up to 3mm line Hope this helps.

Bush

Bushasked

UMK435U

Honda grass cutter 435U starts well but when I squeeze on the trigger for more power it increases speed and suddenly looses its power or dies out. I have tried replacing hoses to and from petrol compartment, changed primer and air cleaner sponge and put in new diaphragm. After using it for 1 hour it played up again. Need your help please.

3 answers
1.6180339
1.6180339

Buy youself a can of carby cleaner. Thoroughly go through the carby, replace or at least clean the filter in the pickup and run new premium fuel only. I recently got some awful E10 fuel and it ruined my stihl brushcutter, a mates minibike and very curiously seemed to 'melt' the tanks of 2 brand new Chinese pitbikes I had bought for my kids xmas presents. God knows what was in it but I had to do all of the above things to get them running again. They had exact same symptoms you speak of. I gave up on the stihl brushcutter in the end and bought the UMK435 and 8 hours use later am still trouble free.

John71
John71

The previous answer sounds pretty good. Only a theoretical possibility, I haven't tried it yet, but reduce its maximum speed; mine cuts out too on high speed. Let us know if any of the offered solutions work. Cheers

abjingle
abjingle

Ok, I see lots of people are having this bogging down problem with their Honda brushcutters. I had this problem too, got on YouTube and learned how to do a rebuild of the carby with a rebuild kit I bought at the dealer. It's not terribly hard (nor expensive, genuine kit was $40ish) but I have since found I can fix the problem by adding a splash of carby cleaner to the fuel and just leave it to idle while I make a coffee or bite to eat, come back and get to work again. The product I use is LiquiMoly Carb and Valve Cleaner or similar sounding name $15-20 but you don't use much - there are a few products that are similar, I can only vouch for this as I haven't tried any others, I have been doing this for about 5/6 years as needed, prob once a year or so. Btw, the problem generally comes from stale or bad fuel- yes, I get lazy sometimes and use old fuel when I shouldn't. Use fresh premium (under one month old) or put stabiliser in when you get it home to keep fuel longer term, DONT use E10 and it's best to tip unused fuel out of the machine when you are finished work (but I don't :-) except before I hang it up for the winter). My model is um?425 straight shaft so a bit smaller and with D handle but it's done a LOT of work, had it 10-12 years and still going hard, starts on 3rd pull now when cold, 1st pull once warm. Only looked at these reviews cause a 2nd hand 435 is available nearby and wanted to see if others are happy with the bigger model. Btw if you're having trouble with bump and feed, the line will bind (melts and sticks together inside the reel then won't feed) and then break off if it's under high load for too long like when cutting long grass where the ends of the line aren't wearing away. If your line is breaking off at the head and you keep having to pull head off to fix, just bump more often and rev up to let the cutter under the guard cut the ends off. I use 2.7mm cord, 3mm cost same for less length, I'd rather feed more often - 3mm will bind before it needs feeding but might be better for higher wear situations like constant edging or digging away dirt under fences. I prefer Honda star cord looks like a plus symbol in cross section - cuts grass better than round cord, but Husky cord is what my LD has, it's good enough and cheaper. Hope that helps, YMMV.

John

Johnasked

UMK435U

The 'Stop' switch flick-up does not shut the equipment down! I have to shut it down by using the choke lever. Is this a common problem? How to fix?
UMK435U Bike Handle(SN: HADU-1027207) approximately 15 hours of service since new.

1 answer
cowpen
cowpen

The switch certainly SHOULD shut it down, so it sounds like you have a dodgy switch - pretty ordinary after only 15 hrs use. Haven't had that problem myself, but I can't imagine it would cost much to replace. Good luck.

kenmcdonald76

kenmcdonald76asked

UMK435U

Can you please tell me what the valve clearances are as my manual doesn't have them? thanks .

3 answers
Thomas
Thomas

G'day mate GX35 Intake 0.08 +/- 0.02mm exhaust 0.11 +/- 0.02mm

kenmcdonald76
kenmcdonald76

Thanks heaps mate much appreciated!!

Thomas
Thomas

Not a problem mate glade to be of assistance

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