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Honda UMS425/U Questions & Answers
UMS425 Bent Shaft, UMS425U86 questions from our users
George Hatfieldasked
what diameter nylon line is used on a UMS425U
No answers
Glen W.asked
Ive just bought a new speed feed head for my ums425ud the cord has run out but there is still cord inside unable to get open to get it out any suggestions please
No answers
Rob S.asked
Can you replace a bump feed head with an alloy manual head on a hond whipper snipper
1 answer
There are kits on-line that claim to do just that and I've used a blade on mine instead of the head so I would think the answer is yes.
Geoff T.asked
Trying to replace a worn out head unit but although I am getting it to stop with a screwdriver inserted into the hole the head won't unscrew...anyone have any tricks?
No answers
Lindaasked
my trimmer will not start i have changed the spark plug
No answers
Linda A.asked
My trimmer does not start I have changed the spark plug
1 answer
Not sure what your question is.... are you looking for what next steps? If it is new, I would suggest taking it back to where you bought it, if it is older, I would suggest taking it to a mower shop for a service. Just a few trouble-shooting ideas: If it has sat in the garage for a long time, add some fresh petrol (new from the petrol station, not more old fuel, as it can go "bad"), make sure the on/off switch is set to On, make sure you have primed a few times, and the choke lever is set correctly. Other than that, if those ideas don't work, get it serviced.
John Droverasked
What size line is recommended for Honda 425/u
Grahamasked
greg joblingasked
can I convert this from a bent shaft to fit a straight shaft ?????
No answers
Emanandlasked
My UMS425 will not idle. It runs fine but as soon as I let off the throttle it stops. Have pulled apart the air filter body from the carby in case the O ring seal had cracked or deteriorated but was fine. Getting new spark plug to try but an outside chance it is that. I use 95 grade petrol. Have replaced fuel lines and filter. Adjusted the throttle to correct free play but still stops. Only if I adjust throttle so no free play adn at higher revs will it not stop. Any ideas!
2 answers
The needle on the rotary valve of the carburetor needs to be adjusted, most likely out (anticlockwise) as it seems like it may be running lean on idle. This often happens when the internal carby parts harden from E10 fuel, or it is an older machine. Later model machines require a specialised tool to do the adjustment, most mower shops toss the carby and fit a new one as adjusting correctly is a specialised skill.
Thanks Craig, I was thinking of replacing the carby. Quite cheap on EBay but gave it one last go as I was getting annoyed with the grassy edges. I readjusted the throttle cable ignoring the 1~3mm idle free-play and low and behold it started idling. I added about 10% Metho to the tank to deal with the methanol residue and so far so good and will continue doing this for a while. If this occurs again a new carby is on the cards. Cheers
May P.asked
what is the difference between UMS425 and UMS425U models? Can't seem to find answers online.
No answers
McJasked
The line is automatically releasing from the spool & winding itself around the outside of the cutting head. I have tried rewinding but does not help. The cutting head is the original that came with the trimmer. This happens with both the 3mm twist line & the 2.4mm round line. Both these lines worked well previously.
No answers
Anthony T.asked
How to feed string
No answers
Vickiasked
lyndam68asked
Cord keeps coming out, gets longer until it wraps around and caught up any explanations?
Thanks
No answers
Peter B.asked
tomasked
The head fell off when I bumped it for extra line. after replacing it does not rotate now?
1 answer
Yes I had the same problem mine fell off and rolled down the street. I went to Bunnings and bought a universal head that has three fixed pieces of line that you replace when they wear out. The Honda heads are worthless and had I known how bad they were I would not have bought it in the first place.
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