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Old 05-01-2010, 03:33 PM
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Default Briggs 3hp and ?Honda gx100?

i have aquired these engines for 10 and was wanting to get them running. the briggs seems reasonably complete except airfilter, recoil and sparkplug cap. the engine that looks like a honda gx100 is complete except recoil, recoil cowling, ignition coil and plug, and filter. i am looking at the briggs first, and it has good compression, should be getting fuel, but i cant get the coil to give me spark. it gives a bloody good shock when touched whilst turned over tho! any ideas to get spark without the cap? and also what is with the carby?
Edit: do briggs have caps? as i saw a pic on google images of 1 like mine.
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Old 05-01-2010, 04:40 PM
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Hey I like your Honda, Its an older G-series made before the GX series came out. The flathead G-series came in 8 different models ranging from 3.5 to 10hp. These old Honda's were pretty good engines that won a lot of kart races back in the 70's/80's. I've still got a running 10hp, G-400 I raced on my kart last season.

You'll find some Honda G-series info here: http://world.honda.com/history/chall...77themeengine/
Here's all the G-series owner manuals, they might help ya figure out what model you got there : http://www.honda-engines.com/engines...anuals/own.htm
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Old 05-01-2010, 04:52 PM
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You probably have points ignition. Their should be 3 wires coming from your coil , Spark Plug Wire, Ground Wire, and Points Wire. The points wire goes down behind the flywheel. Pull the flywheel and sand the points a bit, and check the gap.
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Old 05-01-2010, 05:17 PM
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Thanks I will look tomorrow
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Old 05-01-2010, 05:19 PM
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I'm about 90% sure u dont have points. If your getting shocked, there is a good chance you just have a bad plug.

The carb is very unique, it sucks gas directly from the tank, through pickup tubes. It has a diaphragm inside that can go bad, so you may have to replace that for it to run well.
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Old 05-01-2010, 05:33 PM
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Thanks kk does any plug work because I have a spare plug which is the same thread but bigger
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Old 05-01-2010, 06:10 PM
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A spark plug is $3, it isn't worth messing with. I have seen bad plugs do STRANGE stuff.
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Old 05-01-2010, 06:12 PM
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I know just I have a spare plug and there is no point me going to get one if it will work, although the White bit on the end is longer.
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Old 05-01-2010, 09:29 PM
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looks to me like a points motor.....
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Old 05-01-2010, 09:31 PM
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Quote:
Originally Posted by Kaptain Krunch View Post
I'm about 90% sure u dont have points. If your getting shocked, there is a good chance you just have a bad plug.

The carb is very unique, it sucks gas directly from the tank, through pickup tubes. It has a diaphragm inside that can go bad, so you may have to replace that for it to run well.
Look at the coil again
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Old 05-02-2010, 01:44 AM
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I will see if it is points later. If it is that may be it's only problem but it may need a carby clean.
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Old 05-02-2010, 01:50 AM
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@anderkart; thanks I am 99%sure the Honda is a g100 but only 2.2 or 2.5hp
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Old 05-02-2010, 07:26 AM
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Dedinantly g100 83cc because it says on the block
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Old 05-02-2010, 04:42 PM
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I agree with Kaptain Krunch on the spark plug. If it gives you a strong shock, you should get a spark. Don't bother with the points until you are sure you have a good plug.

You can hold the wire so the end is a couple of millimeters (1/8" for my fellow Americans) from your block or head. Pull the rope and you should get a spark between the engine and the wire. If you get a spark without the plug, try a different plug and see if it sparks across the plug gap.
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Old 05-02-2010, 05:17 PM
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Ok thanks. I think it is points, as it has some extra wires
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Old 05-02-2010, 05:25 PM
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Its a points engine, electronic ignition coils are easily identified by the electronics portion in between the leading leg of the coil and the coil itself.
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Old 05-02-2010, 08:15 PM
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Quote:
Originally Posted by Kenny_McCormic View Post
A spark plug is $3, it isn't worth messing with. I have seen bad plugs do STRANGE stuff.
Yeah I had one that had a little bit of rust on the insulator which was actually shorting the plug out because the spark was jumping from the boot onto the rust. I wiped it off and it was better. easiest fix ever :P
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Old 05-03-2010, 12:43 PM
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Okay, I found a coil for the Honda. It looks in better condition than the Briggs so I am going to try and get it working first as I have a coil. I get good spark, but no go. I have cleaned the head. It is completely unscored, and I have tried cleaning the carb, but I an not really sure how? Any advice?
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Old 05-03-2010, 12:56 PM
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is it getting fuel into the chamber?
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Old 05-03-2010, 03:13 PM
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IS it holding compression?
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