Muddy42

I think some models of the RXTs might be autotune, not my one. Thanks

Thank you adw. Is the reverse situation also true? What I mean is if the engine is tuned per your method above, can worn short strings then cause the the rpms to rise, overheating and potentially lead to lean engine damage? Or does this tuning method allow for enough margin for this to happen safely? As an explanation, I use a Oregon jet fit head rather than a bump feed, where the temptation is to keep going with shorter strings rather than change them. I'm not looking for max power output just a safe tune where the engine is fine even if the strings snap off. Thanks

Thanks. Sorry, I’m struggling with the terminology. Does that mean the max safe rpm (before leaning) is 12000 rpm and that I should tune to 9000 rpm ?

It gets quite scary if you start thinking that the only sustainable alternative to fossil fuels being reverting to human / animal power. A human can produce 100-320 watts and a horse maybe 700 watts. By comparison you can draw 3 kw from an electrical plug and small chainsaw and many hundreds of kw from a tractor sized machine or harvester.

As per the title, I bought a new 53cc Husqvarna 555 RXT Strimmer last summer. The manual says the H is screw is tuned at the factory but it should be adjusted after running in, however it gives no advice on max RPM. Just for fun, I measured it with the tach yesterday - at full throttle it reached about 8400 rpm, clean air filter and with full lengths of string . Is this about right? I don't need any more power (it has loads already) I just want it to run at a speed that is best for the engine. Thanks

I don't feel guilty at all about lighting stoves. Yes the wood is sustainable - its from windblown trees or forestry that is replanted. Transporting it a few miles and processing it requires some diesel but less than transporting other fuels.

If it helps you, a neighbor in Scotland just sold about half an acre of mixed standing woodland with diseased larch. With re-fencing costs it was net zero in total, but the threat of falling trees was sorted. Tricky access and steep bank next to a main road. Lots of hand-felling required. The buyer recovered 50:50 firewood and poor quality mill wood. Both timber markets may be better in England, but you get the picture.

Standing dead and diseased larch is often a headache and liability for a landowner. In time it will start falling and damaging fences and roads. Offer the farmer some loads of firewood as payment?

If it was me, I'd just buy a the correct 4mm bare file and make a handle out of a piece of hazel wood. you'll do a better job that a 2 in 1 system. As has been said flat files for the rakers are interchangeable. new files are cheaper than buying new chains sprockets or bars. You'll find a use for them, I sharpen all kinds of things aside from chains. Plus its a good idea to 'drop the file size' occasionally when the chain is getting well used to restore the C shaped profile.

Do any of those other screws fit? You can get special "security" bits for the star shaped one on the right. If yes, measure it or take it to a dealer and they'll have one.

I've got a thicknesses like that, except mine has two added dangers - a table saw and it runs off an uncovered belt from an motor. I find it so scary to use, that I rarery use it.

I run both multi-fuel and wood only stoves with just wood and don't find there is much difference. As you say its still possible to build up a bed of ash in the MF stoves anyway. Many of them are also adjustable - the grate can be replaced with vermiculite if you change your mind. I guess an iron grate might be slightly more robust and long lasting, vermiculite needs replacing occasionally. Sorry to add another dimension to your selection, but I'd treat some of the newer eco design stoves with caution. These are designed by scientists for maximum efficiency and minimum air pollution under perfect laboratory conditions (perfect draught, perfect weather, perfect flue, perfect modern house) and with little control over air flow and a large baffle to recirculate air. In real life many of them can be tricky to light and/or smoke back into the room. Yes older stoves such as Clearviews might be less efficient and send heat up the chimney, but I find them much more pleasant to operate! Do some research.

Never heard of that before! When you are using the stove, they won't like the environment at all, in the summer just keep the stove door and vents closed. If you are really concerned, you could always use an anti moth bomb, but then a small fire in the summer would have a similar effect Is this a recently installed stove or liner? A well used flue will be a pretty toxic environment even in summer. If its new, maybe the problem will go away with use.

Above is a print out of a stihl file size guide - left column = chain pitch in inches and mm and right hand column = file diameter. The stihl kits have everything you need to maintain a chain - search for "Stihl filing kit for 0.325 inch chain"

Yup I was thinking of that aspect too, but you explained it better.

Not sure about that? All other brushcutter blade bolts or heads I know of are reverse threaded, (when looking from below) to keep them on. These hex screws are right hand thread. Surely if staying on was a problem, right hand thread (when looking from above) is subject to the same forces as left hand reverse thread (when looking from below)? My head hurts now.

This jet fit head arrived and it is definitely a copy, but a good one at that. I'd have no issues using this other than the four hex screws are made of very soft metal and I nearly stripped one. I only needed one spring but I'll keep everything else incase I need any other parts. All the other parts look fully interchangeable with the original Oregon head..

Agreed. To the OP, try a new reputable sparkplug and let us know how you get on. A new plus will have crisp threads (not sure if the one you've used was damaged at the same time as the thread?) plus a stronger spring washer.

Maybe try a new sparkplug with crisp threads. New sparkplugs will also have a stronger spring washer? Use grease.

Never borrow or lend chimney/draining rods! I have learnt to my peril that if the rods are poorly looked after an end can come off and get stuck, either up the chimney or down a drain. I doubt your rig would do much cleaning. No offense, but any competent DIY-er should own a set of 3/4 inch chimney rods, the money spent will repay you many times over in sweeping fees or drain SOS fees. I've used mine hundreds of times. Bailey Industrial Bailey Universal 30ft Chimney Brush Sweep Sweeping Drain Rod Set Kit WWW.BAILEYSUPPLIES.CO.UK The Industrial Bailey 30ft Chimney Brush Sweep Drain Rod Kits includes 4 popular tools with the following contents: 10 x 3ft x 3/4 inch Blue Rods 1 x 4 inch plunger 1 x 4 inch drop...

Just a few thoughts. Check the swing of the door doesn't bang the wall with your configuration? A hot door might leave a mark. Continuing on the point, stoves are pretty messy, you might want a box of logs nearby or somewhere to stack a poker. So rather than plaster, it might be a good idea to have some kind of hardwearing wall or fireplace round the stove anyway? Finally stoves can be moved and flue angles inserted, if this is required in the future. Maybe get your installer to promise he will do this, if it turns out it needs more space.

Genius, thank you. I have ordered the ebay head. I'm not sure how I missed both those links. Yes it works well, thanks. I probably read your post, I can't remember. Although I have often wondered why Oregon didn't put the four hex bolts the other way up, safely facing the sky? It takes a bit of care and picking out muck not to strip them. One day I'll probably manage to smash them up.

Yes I'll try my dealer. At the moment I'm running a four line head with two lines opposite each other. This works better a the nut is protected, but it would be nice to have all four working, so that if a line got stuck I could cut it off and keep going with the two spare holes. Opening up the head in the field is not ideal with the risk of springs flying off everywhere.