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Chainsaw engines V weedeater engines for RC use

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Chainsaw engines V weedeater engines for RC use

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Old 04-10-2008 | 08:20 AM
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Default Chainsaw engines V weedeater engines for RC use

Hi all!

After trying to replace a piston for a friends C***tsman chainsaw I discovered that the ports and carbs on these engines are huge! Question? Can you swap say a Poulan barrel and piston from a Poulan chainsaw to a Poulan trimmer? It would save alot of porting time. I have been told that since chainsaws aren't used as frequently as other garden equipment they don't fall into the same emission category so they are not as strangled. Is this true? Chainsaw engines are generaly alot more powerful then trimmers, blowers etc. The only hassle I can see is trying to cut these things out of the chainsaw body.

As for my friends C***tsman chainsaw it ended up in the trash!! Why? Because Craftsman in their infinite wisdom don't make any of their products and refuse to tell you who makes the tools for them! Now this generaly wouldn't be a problem if it weren't for the fact that Craftsman obsolete their parts after only a couple of years! This renders everything they sell obsolete and impossible to get parts for within a couple of years life span! GOOD ONE C***TSMAN!!! Unless that is if you want to spend a heck of a long time on the net researching for the original manufacturer and then trying to deduce the right model! Their stuff is garbage anyway.

I will never buy a C***tsman tool!

Anyway does anyone have any ideas on this?

Rich
Old 04-10-2008 | 01:26 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

Craftsman simply repackages their saws.
It is a Poulan, Ryobi and not to often an Echo.

What was wrong with the saw?
Old 04-10-2008 | 01:34 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

My friend got it for free and gave it to me to see if I can get it running. It was locked up and had more silicone on it then I have ever seen in my life! Some idiot really had got his hands in there! Well it looks like when the afformentioned idiot put the rod in he dropped one of the rollers in the case! Well when he started it the roller took chunks out of the piston skirt and locked the engine up! Some people really shouldn't have access to tools! Luckily it didn't damage the crank, rod or barrell but it did wreck the piston. Unfortunately I can't find the parts and after being on the phone to Crapsman (They were clueless and their PCs were telling them it was made by Crapsman NOT!) I gave up and will be returning a bag of shrapnel to my friend!

Rich
Old 04-10-2008 | 02:11 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

Especially here a picture is worth a gazillian words.
Old 04-10-2008 | 02:27 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

Your wish is my command!

Rich
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Old 04-10-2008 | 02:45 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

That front facing carb will be a challenge. Never could get one of those or a carb on the bottom of the engine cover to do much.
Old 04-10-2008 | 02:50 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

Front facing carb = ram air! Unfortunately it looks like the engine is scrap, it's not mine and I don't know what engine it was originaly and C***tsman have obsoleted it so I can't get parts!

Rich
Old 04-10-2008 | 03:12 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

Ram air yes, but, you will have nothing but trouble trying to tune the engine with the prop blast. Many of us have tried it and it doesn't work.
Old 04-10-2008 | 03:22 PM
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Default RE: Chainsaw engines V weedeater engines for RC use

From the motorcycling days we deduced that it works better on fuel injection and if you must use carb then the carb has to be inside a pressurised chamber so that the pressure is equal inside and outside as in supercharged applications. Anyway it's not my motor and invariably it's going to end up in the trash. When I use to run a motorcycle company our new dyno was suppused the have a pressure air feed for tuning ram air but alas I left the company before I was able to get familiar with it.

Rich
Old 04-14-2008 | 10:03 AM
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Default RE: Chainsaw engines V weedeater engines for RC use

Old Quadra 35, Trail Mfg in Canada, parts available at bennettbuilt.com
11 rollers...
Old 04-14-2008 | 10:24 AM
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Default RE: Chainsaw engines V weedeater engines for RC use

Thank you.

Close but no cigar! I have already looked but the old quadra from what I saw had the intake on the side and not in the front. The cylinders are slightly different shapes as well.

Rich

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