so it makes sense to me that i shouldn't have to replace a part unless it's broken. I did notice that the carb is leaking a little bit when just sitting there.Īs far as i can tell all the engine parts are stock. i may have changed the flow regulator screw in the process, but i have readjusted that screw since then to try to fix the problem with no success at all. it has had a slow gas leak since i bought it (about a month and a half ago) and i tried to look for where it was coming from. this puch was going to be my learning tool. i am quite new at engine troubleshooting. I can start it and idle it just fine (except it idles fast now), but when i turn the throttle to rev the engine, the engine stops. on a drive across town it started slowing down its max speed (it usually goes at least 30 on a long straight flat road but this time it could only get up to 25) then shortly after that the engine stopped altogether. It was working just great up until a couple weeks ago. I have been reading this thread because my puch has been having a similar issue. You could also just drill a whole bunch of holes in the tube as well.
You have to rig up some sort of way to keep the muffler from falling off. than you have no restrictions, and can get a vaccuum going. Oh, and better yet, Take that hole baffle tube thing out of the exhaust. You also need a bigger jet, because you need more gas to go in wtih the air, and then you need a baffle with a 15mm hole for the exhaust. You get a bigger intake, ie 15mm, you get more air going in. the only difference in the Puch engine sizes, between 1.5 and 2 hp was the airflow.
1977 puch moped manual how to#
Knowing that, you now know how to make youre engine more powerfull. This should fix youre problem.īy covering half the intake, you essentially cut youre engine power in half. Fill it with carb cleaner, shake it up, dump it out, and do it again. Then you can pull the whole exhaust chamber off. this is a little tube with two holes in it. You can remove the screw from the end, and pull the baffle out.
1977 puch moped manual manual#
This is a common Puch Problem, and the manual even details cleaning it once in a while. So you can assume that you dont have enough flow out youre exhaust. So if it is running Good when you are clogging the intake, you are essentially Matching the Output. The size of the intake going into the engine must match what is coming out. So how is it getting too much air? the air flow must be restricted. It has the right size jet for the carb, and it has the right size intake, and it has the right size exhaust.
If you say that covering the intake makes it run better, then it is getting too much air for the CC's. Bogging out as they say is the result of a bad fuel to air mixture. Assuming that everything is stock, then we can solve the problem.