Sachs / Saxonette (Arctic Cat Whisker - Rebuild) won't start- Please Help !

[Rapini]

Sachs / Saxonette (Arctic Cat Whisker - Rebuild) won't start- Please Help !
Ok had the Arctic Cat Whisker running 'till the pull start went then it was buried in the back of my shed... Now she's back on my workbench as my son (now 9) asked if it'll run ?

Here's what I've done so far :

1. removed all old gas from tank
2. removed & cleaned carb (Bing 1/12/1670) used carb cleaner followed by Sonic Jewelry machine
3. new spark plug NGK7BH gapped to 35

I found on another post that someone said there should be a head gasket at the top but looking at parts photo doesn't show a gasket at the top only the bottom.

A compression check shows 80-85 with throttle cranked open

I have no idea how to set the screw (with spring) & jet (brass ) on the carb

1 of the studs that holds the reed valve is cross threaded & will need to be addrerssed ( 1 step forward 2 steps back)

Finally each attempt to ressessatate her I've been using a cordless drill (in reverse counterclockwise) I'll revisit the pull start later.

My goal (our goal - he's helping me out with this) is to make it a rider for now however if parts become too hard to come by might just swap out the engine - last resort.

 

[ArcticMinibike]

I can help you. I'll dig up the factory info on setting the carb and timing. There is NO head gasket on these engines, only a cylinder gasket where it meets the case. I've posted a thread here a while back on how to start it without a recoil, just a T-handle and about 4' of cord wrapped around the recoil drum.

You must make sure the jets in the carb are clear, I use a bristle from a stiff nylon paintbrush. Once you make sure the carb is pre-set properly and timing is right with good spark, you're 90% there. I'll dig up the info and get back to you ASAP.

 

[ArcticMinibike]

One issue I see right away is that the Saxonette factory spec for the spark plug gap is 0.019", not "35" (assuming you meant 0.035").

 

[ArcticMinibike]

After setting the gap correctly, check for good spark. Are your points clean? I use a tiny folded over strip of 400 wet/dry paper and let the points clamp down, then slide it out a few times til clean.

If that looks OK, verify the carb jets are clear. Did you completely disassemble the carb when cleaning? Clear every hole with a wire or nylon bristle? Is the float and needle in good shape? The needle clip should be on the third notch for most altitudes.

The cross threaded stud for the reed valve will be a problem as you need an air tight seal on that joint. You can buy a replacement stud but I've never replaced one. Might need to heat it for removal. I probably have a used one.