StihlSolo
Mechanically inclined
Been working on this first version 048. Came with non-op SEM ignition. After trying two more coils, tried a coil from a Solo 662. Nice big spark, timed right. So that gave the go ahead to fully sort this thing out. Replacement OEM top end. Double pawl starter yanks my arm off. Bottom good. Added a working chain brake. Last mechanical issue was the air cover, was tricky to fit on.
Found that the cover was scrunching the ground wire. Found that the wire has to be routed exactly: in the air box it has to go behind the tank vent and through a notch in the ridge where the air filter lands otherwise the filter squeezes the wire. Red arrow in first and second pictures.
Then found the air cover baffling lands into the a trench in the air filter. Wire has to go where it can loop so the the control rod can work and there it has nowhere to fit, so the cover baffling squeezes down on the wire. Second picture blue and green arrows.
So ground away about a 1/4inch from the baffling and a tang that also pinched the wire. Circled area in third picture. Now air cover slips on no problem, thing starts and runs fine, and cosmetics are next. All these interference problems explains why the two earlier coils I tried had ruined ground wires.
BTW, This has been the most frustrating overweight PoS I've worked on. Hope the Stihl design team that came up with the 048 got fired, after three major tries to get it right in as many years and then it got discontinued. They're the same ones that did the 028 and 038 which are only just a little bit easier to work on...
Found that the cover was scrunching the ground wire. Found that the wire has to be routed exactly: in the air box it has to go behind the tank vent and through a notch in the ridge where the air filter lands otherwise the filter squeezes the wire. Red arrow in first and second pictures.
Then found the air cover baffling lands into the a trench in the air filter. Wire has to go where it can loop so the the control rod can work and there it has nowhere to fit, so the cover baffling squeezes down on the wire. Second picture blue and green arrows.
So ground away about a 1/4inch from the baffling and a tang that also pinched the wire. Circled area in third picture. Now air cover slips on no problem, thing starts and runs fine, and cosmetics are next. All these interference problems explains why the two earlier coils I tried had ruined ground wires.
BTW, This has been the most frustrating overweight PoS I've worked on. Hope the Stihl design team that came up with the 048 got fired, after three major tries to get it right in as many years and then it got discontinued. They're the same ones that did the 028 and 038 which are only just a little bit easier to work on...