HS 142f won’t idle or start without starter fluid

[Aaron Brown]

Thanks, I’ll try that

 

[Aaron Brown]

So that part’s threads were more like 6mm and the part didn’t fit.. I got a new carb since it was half price and readjusted valves again and... still won’t start, even with starter fluid. Almost wants to start and begin idling but won’t. I’m determined to find out if I have enough compression with this engine but can’t find a fitting. I should probably just shell out for a new engine after all this... Any more ideas? Thanks

 

[Aaron Brown]

If it didn’t have enough compression would it even throttle up with no tire load? Maybe just not quite enough compression?

 

[junglepig]

So that part’s threads were more like 6mm and the part didn’t fit.. I got a new carb since it was half price and readjusted valves again and... still won’t start, even with starter fluid. Almost wants to start and begin idling but won’t. I’m determined to find out if I have enough compression with this engine but can’t find a fitting. I should probably just shell out for a new engine after all this... Any more ideas? Thanks

Sorry. I hope you got a refund. They definitely said it had M8 threads.

So that part’s threads were more like 6mm and the part didn’t fit.. I got a new carb since it was half price and readjusted valves again and... still won’t start, even with starter fluid. Almost wants to start and begin idling but won’t. I’m determined to find out if I have enough compression with this engine but can’t find a fitting. I should probably just shell out for a new engine after all this... Any more ideas? Thanks

I looked up a plug for the hs-142F, (NGK7544) and it has M10 x 1.00 mm threads. If that's rights, then of course the 8mm adapter wouldn't work. Have you tried a 10mm adapter, or is my spark plug info wrong?

 

[Aaron Brown]

Ahh s**t, how dumb! You are right, it is M10 x 1.0 thread. Idk how I had that wrong the whole time.. I tried the auto parts compression kit in the past and could have sworn I tried the smallest fitting, but maybe it was 12mm. Back to the store/online for that 10mm adapter then.. Thanks for pointing that out. I think compression is gonna be the problem since a new carb and new gapped plug didn’t help.

 

[Aaron Brown]

I obviously don’t know how to measure threads

 

[junglepig]

Ahh sh*t, how dumb! You are right, it is M10 x 1.0 thread. Idk how I had that wrong the whole time.. I tried the auto parts compression kit in the past and could have sworn I tried the smallest fitting, but maybe it was 12mm. Back to the store/online for that 10mm adapter then.. Thanks for pointing that out. I think compression is gonna be the problem since a new carb and new gapped plug didn’t help.

LOL. Glad that's sorted out. You won't hear me judging.

 

[Aaron Brown]

Good quality Bosch gauge shows about 100lbs which should be fine, no? New carb, new gaskets, new plug, new head gasket, valves at .004/.006”, compression good, spark test was fine. Still workin..

 

[Old Busted Hotness]

Static compression is 7:1, so 100 pounds at cranking speed is just fine. Check your carb gaskets, maybe a manifold leak?