"performanace" weedeaters?

comfortableshoes · #1 (**permalink**) 08-26-2008, 05:12 AM

I snagged a homelite off craigslist for $15, I'm picking it up tonight after work. SHould be another good fun engine. The homelites have all kinds of modifications available for the RC boating industry. My father is into that and he's sent me to a few after market sites where they sell, mini radiators, cool kits, nitro, etc specifically for the homelite. I've read a few posts disparaging the homelite engine but unlike most weed eater engines it has bearings and not a reed. Apparently Echo and homelite are 2 of the few manufacturers that use bearings.

Has anyone taken a weedeater and done what the people who use them in rc boats and aircraft do and tune them add after market parts and make them scream?

I figure if I have an extra engine to play around with this winter I might try some of this stuff and see what happens.

**Bikeguy Joe** · #2 (**permalink**) 08-26-2008, 07:38 AM

Homelite goes waaaay back, and has a longstanding rep as a good hot engine, kinda like the old Mercury outboards.

I have never added aftermarket parts, but I have "converted" them for R/C aircraft use. I cut down the flywheel, and stripped them of everything....you may want to keep the fan/shroud. They do make tuned pipes, ect for them...have fun!

deacon · #3 (**permalink**) 08-26-2008, 07:43 AM

To be honest I'm not well balanced myself. I'm also not that mechanically inclined. If I did anything at all to an engine it would be for curiosity not to put on a bike. More speed is just a scary thought. I wouldn't mind more hill torque but I think that might just need to be more engine size.

I have yet to get a 31cc to work but so far it hasn't been the engine's fault. I installed the new one I bought wrong, I think. I had it all over the bike and the frame wasn't rigid enough. I think if the one I have coming doesn't measure up, I'm going to try more chainsaws. I don't know why but it seems to be heavier for some reason. I know it is weight wise.

aulit · #4 (**permalink**) 08-26-2008, 08:38 PM

actually they do have performance weedeaters (i know, i'm cutting grass for 3 months now.. 40hrs/week). If you can get a HT (high torque) weedeater, then you're in business, because these machines got twice the torque and sometimes more than a regular weed wacker...

Some examples:
most Echo
Shindaiwa 5120 (or 5210)

and you can get the newest Honda motor which uses same technology as the shindaiwa, in fact ist a 4-stroke engine that consumes mixed gas..... yeah....

LordMaximo · #5 (**permalink**) 08-31-2008, 04:18 PM

If you are after torque for long rolling hills, I reccommend a 4-stroke engine. These engines are built for the long haul and are actually less expensive over a 2-stroke engine. Just like the old mini-bikes from the late 60's and early 70's. Centrifugal clutch as on a go-cart, jack shaft and chained to your mountain bike derailer. Now you have a pull start, electronic ignition, thumb trottle like a snow-mobil or wave runner, and gears to help you along. A 4 stroke engine setup is the best reliable build anyone could do. And you have all sorts of engine sizes to pick from.
Weed eaters are just for toys, such as R/C airplanes and small boats.
You can get a 6.5hp/ 196cc 4 stroke from Harbor Freight for less then $200 and I can asure you it will take you anywhere you want to go for cheap.
Harbor Freight Tools - Quality Tools at the Lowest Prices

It is well worth the time to do it right the first time around.

Maximo

deacon · #6 (**permalink**) 08-31-2008, 04:54 PM

so that is cheaper than my $20 ryobi... I'm sorry I just don't see it... I don't know about torque so I'll take your word for it, but for the price I'll just burn up a couple of weed whackers.

I think the 200 engine is a different animal from the weed whacker. Most likely it's a different mind set from the WW builder. I probably would just buy another 2 stroke kit for 200 bucks it would have all the parts and plenty of toque.

The four stoke kits are about 400 I think these days. That isn't based on knowledge just a vague memory.

Motormaker · #7 (**permalink**) 08-31-2008, 05:04 PM

Maximo that is a great idea and cheap too. I went that route. Untill the cops stopped me and told me to get off the street or face an unlicenced vehicle ticket and a $75 to $100 tow bill. So now I am studying up on 50cc and under bikes to conform to the law. I am working with a 49cc pocket bike engine now.I am a Long time lurker first time poster. You guys got a great forum here for homebuilts.

LordMaximo · #8 (**permalink**) 08-31-2008, 05:37 PM

I forgot about the new laws being tossed at us two wheelers as well. My bad.......lol.......there are those bobbers being handed out with 110cc units. I do know this, a motorized bicycle does not need to be tagged, as long as it still has the peddles opperational. Like the mopeds from the 70's.
I do know that Utah has now changed their cycle laws, if you have a motor on 2 wheels, it needs to be licenced, and they go by cc ratings for driver restrictions. 90cc, 249cc, 649cc. These classes are restrictions on your licence, and if you test on anything over 650cc, you are in the unlimited class. So, for those in Utah, it doesn't matter, if it has 2 wheels and a motor, it needs to be tagged and you need to have the proper papers to ride it on the open roads.
This is the first state, and the rest are sure to follow suite. I guess for those who can get away with the small cc motors, hats off and good luck to you all. Here in our state, they go the extra mile to collect money from every avenue they can find. Like the little pocket bikes, you need to have it registered and tagged, and you need to have the motor cycle endorsment on your drivers licence. Or you do face a trip to the judge.

Maximo

Motormaker · #9 (**permalink**) 08-31-2008, 07:17 PM

The pocket bikes are not road legal here at all. They don't meet the criteria for the state of Indiana's definition of motorized bicycle,motor scooter, or motorcycle.

comfortableshoes · #10 (**permalink**) 08-31-2008, 08:01 PM

pocket bikes aren't street legal here in Mass either, but I have a 4stroke 49cc pocket bike engine, cvt 4 speed tranny ready to go onto an OCC chopper frame. Frame is cut and ready for the mount, just waiting on funds to buy the motor mount, sprocket and chain, should be sick fast and haul @ss.

For me the 2 stroke weedwacker is more of an exercise machine- I pedal along with it so that I can keep my fat butt up with traffic so I'm safer.

The pocket bike motor- that's for my inner need for speed and burning rubber and to get my significant other into the fact that I want a motorcycle- a bike with a motor seems safer... then I get a moped, safer right, then I spring the Hog. And as of right now it's far cheaper becuase I don't need a motorcycle license or insurance here in Mass. For $40 I can ride it for 4 years.

I do agree with you a 4 stroke would have far more torque than a small weed eater. But with a jack shaft and a centrifugal clutch the weed eater motor can be modded into far more than one might think, Lets face it the chengines aren't much more than a 49cc weedeater engine with some gearing. (I'm not carping on chengines here either, I'm just saying they are one step away that's all.)

If I want to be legal her ein my state I have to be 50cc or less. So I'm sticking with that, there are a few websites that sell the hausheng honda 4 stroke 1.5-2hp clone for about $150. I am considering that for a build as well. There are site that sell kits for MB with those as well.