Honda UMK425 Questions & Answers
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What is the difference between the UMK425ULSTUT sold by Bunnings and the UMK425L sold by most others. Is that just a gimmick to avoid matching prices as no one else sells the Bunning model.
Did you find an answer. I have same issue
Hi Steven also keen to understand this as I’ve heard people returning their Bunnings (ulstut) multiple times for various issues only to be eventually refunded then buying the same model from a Honda dealer and never having an issue. My guess is either the Bunnings model is assembled somewhere different possibly a different country and/or certain parts are sourced/made from a different location/supplier. This is what Honda responded to me.
“Thank you for contacting Honda Australia Motorcycle and Power Equipment.
Honda Australia can confirm, there is no difference between the models performance wise on the UMK425 at Honda Dealerships vs Bunnings.
You may also see the different codes of UMK425ULSTUT or UMK425ULTUT and colours, However they are only basic code differences for distribution purposes.
We trust this information clarifies.
Should you require any further information, please don't hesitate to contact 1300 559 846.
Once again we thank you for your contact.
Kind Regards,”
If my 4stroke whipper snippet stored on its side oil runs out the carny and won’t start information says this way shouldn’t Matter what now
I'm not a motor mechanic and I've not had this problem with my machine. I don't normally store it on its side but have had it roll around in the trailer at times without problem. I can't see how the oil would get to the carby as the fuel & oil systems are separate. Could oil have been put into the fuel tank by mistake? Could the oil be leaking from somewhere other than the carby? Sorry I can't be of much help here, you mkay have to take it back to a dealer. I treat mine rather harshly but it hasn't missed a beat.
Can you put an edger gear head on one of these line trimmers? I have a spare umk425 that I wanted to turn into a dedicated stick edger.
Really would not know. Best ask a dealer. I just lost more hair trying to keep it running while trying to cut grass.
Idles sometimes, but pulling full throttle then release, it cuts out?
On long grass, cuts sometimes but slowly dies after & during cutting?
I haven't had this problem at all, I have given it a pretty solid workout and it has plenty of power. I do use the higher octane petrol, not standard though.
how do you rethread snipper cord>
What length is the shaft from the point of the engine mount to the cutting head on honda umk 425u?
I tested the 'quick release latch tab' on the included shoulder harness, and now I cannot put it back in! I'm wondering if a crucial part flew off when it quick released, but I don't think so. The tongue, which is angled, just simply does not fit in the slot of the assembly. I ended up using it without the harness because of this, and I feel idiotic, but am I missing something? Could somebody perhaps upload a photograph of a properly assembled shoulder harness quick release assembly, so I can see what I'm doing wrong?
Can you show me a diagram for carbie kit rebuild please thanks al
Has the UMK 425 got a shoulder harness to take the weight of machine
Yes, it comes with harness, but I bought a more heavy duty one, which is more comfortable than the one that comes with it.
Keith Thank you re harness where did you purchase harness Graham
My old faithful 425f is cutting out regularly and refusing to restart would a spark plug change resolve this issue?
A new plug would be worth a try. Also spray some carby cleaner in the carby. Clean air filter. On really old ones , the bearing that comes off the motor can be worn and overhead the engine, causing it to cut out after a while.
Overheat
Thank you for the advise changed the spark plug fitted a new cmr6h, cleaned and re-oiled the air filter cleaned around the mechanics my 15 year old ums 425e is now as good as it was the day I bought it. Regards Alan shaw
Hey guys. Chasing some information or assistance on a new purchase of a straight shaft umk435. My old model needed to be retired after 14 years faithful service. Never any major problems at all with it. The new one (about 2 months old since purchase) is really giving me grief though with leaking fuel from the cap. This has nothing to do with the venting hole as the fuel can be seen finding its way around the screw threads on the fuel tanks neck when in an inverted position. I've since been to my local dealer and (politely)purchased an additional cap from them also which started leaking within the week. I do not over tighten the cap by the way, so a damaged seal cannot be to blame for the problem. I noticed that my original units tank seal has a slightly different design to its outer edges compared with the new one and it makes me wonder if a cheaper seal is being used by the manufacturer, the rubber not capable of prolonged contact with the fuel in the tank. Even more irritating is the fact that i cannot simply purchase the seal, just the entire cap and seal combo.....Grrrrr. Any feedback appreciated.
Have you tried putting some thread tape around it? I know u shouldn't have too but could stop the leak
return the new one. Fix the old one. They don’t build them like they use to.
I'm using Honda for heavy duty commercial work in the tropics down under and all i can say there's nothing equal to Honda products so far. For commercial all day use there's nothing else but a four stroke torquey Honda. Beware of the identical crappy copies!
4 Stroke HONDA is the best machine in the World. You definitely need that 4 Stroke HONDA TORQUE and the proper 4 Stroke lubrication instead of playing with 2 Stroke low life Toys!!!
Can you separate the shaft on my Honda whipper snipper
Yeah you can
UMK425E. Engine will not stop after running for about 30 minutes. It is very difficult to stop. Have had this from new for quite a number of years and this is the first time I've had this issue. Is the engine stop switch at fault? Thanks JMC
Sounds like your stop switch has faulty connection. Remove the red button and look underneath to check for debris. Mine stops the second it is pushed. You could try turn the choke on and pump primer to flood the engine to stop it if desperate, but this is not recommended.
Thank for that. I took the switch out but could not take it apart so I sprayed it liberally with electrical contact cleaner, reassembled and it now works perfectly. It is a very good product in general if you keep up the maintenance routines. Cheers JMC
Is it save to tilt this unit on its side whilst running to do Edging like footpaths etc ? Logic tells me if I do this to a 4 stroke and I will seize the motor. If this is true I'm regretting buying this and iI should have got a 2 stroke trimmer which does not matter if you tip it sideways or upside down whilst running because its lubricated by the petrol .
It’s designed to be used upside down, as is the fuel tank shape and its weighted strainer. The Honda website says “The UMK425 Loop Brushcutter features full 360 "any-side-up" operation, so you can use and store it in any position”
Thanks for the reply , I'm still confused as i thought if you run a 4 stroke motor upside down or sideways the motor it will starve the motor of oil and damage the motor . Whilst you say it can be used upside down , how will this not damage the motor from oil starvation ?
If the Honda website is saying it can be used in any position , What magic are they using to prevent damage to the motor from oil starvation ? - If HONDA state this on their website it must be false and misleading information which defies the laws of physics for gravity .
I think you might be thinking of a regular 4 stroke - that is, a wet sump with a pick up? Turning this upside down would suck air instead of oil and cause problems. However, this engine is patented and not a regular 4 stroke. They (Honda) call it a “rotary-slinger lubrication system“ which is kind of self-explanatory on how it works.
Thanks Paul for the info. Looks like your right and Honda is indeed using some type Magic for oil Lubrication. Looking it up online they are using 2 blades like a lawn mower on the crank case that goes thru the oil sump and causes a mist of oil to lubricate the cylinder even when the engine is at any angle and they use a reed valve to cause negative pressure. URL on how it works which includes a video is here for anyone interested. external link Whats funny is that in my younger days I use to put "Crank Scrapers" on the crank case of my track car to prevent the oil from misting
The product manual says nothing about 360. Says horizontal only.
Unless you have an older model, not sure. But current model says it on their website external link !
How to place cutting chord
external link
Anyone know the difference between the Honda UMK 425 and the Honda UMK 425U?
The UMK425U is the straight shaft with the bike handle.
UMK is the commercial heavy duty line trimmers. The UMK425U is a straight shaft with a bike handle.
I have a Honda bent shaft HLT422 trimmer I need a gear head is there any compatable parts. It has a square head on the end of the cable inside the shaft.
Grahame I have the unit if you are still looking for one. my e-mail is p.cronje@bigpond.com I am in Brisbane.
New part is to buy a straight shaft version. Better.
how to replace a new head
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