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DIY Home Built Motorized Bicycle (non kit) Post all about your home built rides here. Weedwacker motors, lawn mower engines ect. This area is for non kit builds

weed eater bike questions


Discussion at Motorized Bicycle Engine Kit Forum in the DIY Home Built Motorized Bicycle (non kit) forum. It looks as though there may be a basic problem with the weed whacker bike. The engines don't seem to ...
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Old 07-21-2008, 12:58 PM
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Default Re: weed eater bike questions

It looks as though there may be a basic problem with the weed whacker bike. The engines don't seem to be designed to run with much of a load. I ran mine the last two days with too much tension and now it runs like crap. Put it under a load and it has not top end at all. I know I can adjust the carb but I think it is more basic than that.

I believe there is a way around it though. Less tension on the drive wheel. What I think would be best is very light tension so that there is very little stress on the engine itself. What will happen is that I will have to pedal up to speed, then let the engine help us maintain it.

For me it is inconvenient since I have a lot of hills around here. I will probably go back to the chainsaw bike since it seemed to have more balls. I need to let the 31cc bike cool down completely before I try to adjust and run it again.

I know they told me to run it with a shroud but I think it is more than that. I think the engine can't take the strain. After all it was designed to push a string and some grass around not my fat ***.

The chainsaw may do better since it was designed to work under a heavier load. I still want to work on the weedeater tomorrow just to stay with it till the final conclusion.

I lightened up on the spring to allow for more skip of the drive wheel. And i'm running a semi smooth wheel now. Just have to wait and see how it does.


letting it cool down now.
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Old 07-21-2008, 06:28 PM
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Default Re: weed eater bike questions

Deacon,
I'm wishing you luck, I have a MAC 2816 here and I had it running but it won't stay that way long, I would like to examine the carburetor, do you have any idea where I might find instructions or on how to rebuild and or repair, for these type of engines ?
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Old 07-21-2008, 06:39 PM
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Default Re: weed eater bike questions

Hey Deacon,
I wishing you luck, and hope you have something else to ride around on, while you get things going.

I have a MAC 2816 here that I want to use for a non-bike purpose, I got it started but not for long, I want to take a close look at the carb. I have a MAC part Assembly diagram, but would like to find a, How To, for rebuilding and repairing this type of carburetor, . . do you have any idea where I might find one ?
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Old 07-22-2008, 06:30 AM
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Default Re: weed eater bike questions

If you can't google it up I have no idea. I am pretty sure the chainsaw bike I have is going to work with the carb from the weedeater. If I can't get a carb to work by cleaning it, I think I'm just going to buy a new one on ebay. Last time I looked they were about ten bucks. I'm just not mechanical enough to rebuild one.

I have a working 25cc I'm going to put on my latest engine if the one on it is ruined.

The one time I tried to clean one it was a success so I'm willing to try again before I toss it. If you haven't tried a simple cleaning i would do that first.
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