GardenKit

As has been said by others, 3 main requirements. Fuel, Spark, Compression. But in general we find around 80% of engine problems on handheld kit are Fuel related. So, although this advice may now be a little late, the first thing I do on any small machine that comes in is to drain whatever fuel there is left into a clean glass jar. If its perfectly clean and clear, with a good colour and smell, then the chances of fuel problems are less (except for fuel pipes). Proceed with the spark and compression tests as said by others. But often the fuel sample will contain all sorts of contamination which will be clearly seen in the jar. It may be cloudy rather than clear. The cloudiness is suspended water, this will settle to the bottom after a while. There may already be water in the bottom under the cloudy fuel. If this is the case you can pretty well guarantee the carb needs an overhaul and the test has only taken seconds to perform. In our case we try to do this in front of the customer when he brings the machine in. Also worth noting that these Ryobi machines are indeed pretty cheaply made. If they work then all well and good. But the components are pretty low quality. After 5 years you can expect some significant piston/bore wear and you (low quality) fuel lines will almost certainly be perished.

All is well that ends well! Glad you are sorted.

wondered where you had gone Paul, good to see you back

I am not a huskie dealer so not to familiar wit auto tune, but just found this on the webbything seems its carb temp rather than exhaust temp http://cdn.power.husqvarnagroup.com/files/husqvarna/ss/products/autotune/manuals_2012_10_24/manual_engine_diagnostic_tool_english.pdf

Does it also measure exhaust temperature? Just interested to know what parameters it uses to decide on mix?

Uncle Albert: It's parky, Del! Del Boy: [sarcastic] Good, good! Nice thick frost is there? Uncle Albert: Bit slippery underfoot, yeah! Del Boy: Oh, cushty! Nice notherly wind howling in from the Urals is there? Uncle Albert: Cut's right through you, Del! Del Boy: Serves you right for wearing only white jeans and a black T shirt

"this throwback to the days of Wham was obviously made of much tougher stuff than the Lumbersexuals who accompanied him on this strange mission to knock down the 9 rather boring locals who lived in this place. They all thought it was bloody freezing"

Granted, but maybe an investment for the future. Chapter one "the blue light gave the man a strange colour, reminding me of those tall people in the film "avatar" but later, in a different zone, as the smoke from the machine standing in one corner of the zone cleared a little, a tall man appeared wearing snow white trousers. What was really strange was that all the people around were dressed in thick winter clothes to resist the sub zero temperatures, whilst this guy wore only a black T shirt and held a pint glass of some strange orange beverage."

Yep I agree. James Herriots vet stories are nowhere near as varied as Pauls. Reckon a series of "It can only happen to the Fox" stories would sell well.

For what its worth, I have found that most who start up in the tree or garden business buy kombi units purely because of cash-flow. Most move on to stand alone units within a few years when cash-flow eases as they are more reliable than kombi units. My advice would be to buy separates initially if finances allow.

i guess the theory is that the air leakage through a drilling is a constant factor and can therefore be compensated for by increased fuel flow through the carb in the design stages. An air leak in a non vented crank will be due to wear or fracture and the fuel supply will then be inadequate to maintain a rich mix. Adjustment of the mixture will compensate for a small air leak. But the trouble is that the leaks just go on getting bigger and bigger until the carb runs out of adjustment.

You cant see them all Steve!

If I was a moderator post 253 would be gone at least

The problem with the written word is that once posted it is out there for all to see and cannot be taken back. I guess many controversial posts are as a result of an unfortunate choice of words, and many heated discussions could have been avoided by thinking twice and typing once.

very good:biggrin:

How much for cash?

Good idea to put a concrete fillet around, BUT, the OP hinted that the floor has been painted. The concrete wont stick to the paint (I have tried!), so it will need removing first.

I agree that evaders should be stopped, but as an outsider of the log business in question I kept out of the debate, its not my business, I am not involved. But I am involved with the Forum, and implicating Forum members to the HMRC is, in my opinion, bad form. Just saying.

I have nothing to do with logs, but have followed this thread with interest. I have a lack of respect for those who evade tax, not specifically because they threaten anyones business in particular, but because they are not living by the rules. Tax evaders still sit in the pub grumbling about the state of the NHS, the schools, the lack of policing etc etc, whilst not pulling their weight and contributing to the system. The rest of us have to pay their share which really annoys me. So I have been sort of on Logs side in this debate. But sending this forum to the HMRC is just a step too far.

Haha, terms which we do not hear much these days. Thats why I had a straight six 'over square' Triumph 2000 rather than the 4cyl 'square' Rover.

Certainly, torque is not a separate factor, but it is an important factor. Hp is the product of Torque x RPM divided by 5252, but thats not important. What is important is how torque helps the chainsaw user. As an extreme example take two 5hp saws. One modern saw developing 5HP @ 12000rpm, and an old shool Mac or similar developing 5HP @ 6000rpm. The old saw is producing twice the torque at half the speed. This indicates that the torque of saws can be vastly different, but how is torque of value to the user? As long as the higher revving saw is able to work whilst holding on to its revs it will outperform the slower revving saw, but if the revs drop off in heavy work the power will drop significatly whilst the slower revving (high torque saw will be able to keep plodding on. Generally high speed, low torque engines will be short stroke engines with large bores, whilst low speed high torque engines will be long stroke with a smaller bore. Torque, and therefore HP, varies between saws of the same CC due to influences such as air flow (port design) and compression ratios. Hence the 'porters' ability to increase power and torque through port mods and squish.

More thanks to the recent supporters.

Torque is only developed in response to load. A blunt chain imposes no load as it merely spins. Just like a Landy with bald tyres. It just spins, developing high speed but no torque.

The point is this. There could be two different saws with exactly the same cc and hp. But the one with the greater torque delivery will be the best. The max torque will come in beneath max revs, but it is at the point where the revs are held onto best. Torque is what gets work done. High speed equals low torque, and vice versa. Peak torque is where the max power is generated.

And Torque is more crucial to performance than either HP or CC. But at this time of night I cannot explain why!