I recently acquired a savage that has the STS D30 in it. Personally... I'm ready to just throw the engine in a drawer with my axial and forget about it.
But, I figure I might as well see what I can do to make it a little more friendly to run. It probably has about half-3/4 gallon through it including 9 tanks of a heat cycle break-in.
I was with the original owner through the break-in process and every time he ran it after that, which wasn't much.
I ran it the first time yesterday morning prior to doing anything to it just to get a feel for it. It ran pretty bad and I can see why the previous owner was really frustrated with it. If it wasn't tuned overly rich, it would lean bog and just stall for no reason while on the gas. It would also do a weird idle that wouldn't step down once the engine was warmed up. I tuned to keep it below 260F. Regardless of tune, the weird idle wouldn't go away and frequent stalls would occur when on the gas. It also didn't like to idle well at all.
So, I tore it apart yesterday afternoon and sealed it up with RTV. The carb neck, banjo fitting, backplate, carb cinch bolt, LSN threads. I also retapped the starter housing for 3mm instead of what was in it. Put it all back together and took it out today. I had much better results today, but I only had a small spot to run it in due to rain. I ran it in a 60 foot square pavilion at a park with an occasional romp across a parking lot when the rain let up.
Even though it's "better", it's still not an engine I'd give to an enemy. Power is sub-par for what I was expecting, tune is still muddy. It idles well now and no longer has the weird idle that won't drop and it opens up to WOT pretty well if I don't let it sit and idle for more than 15 seconds or so. I still had frequent stalls when on the gas, which I just have never had before. Like 2/3 throttle, then dead. No weird sound, no fluctuation, just flat out stall.
I'm running 25% fuel with an OS8 plug and an MC59 plug. The MC59 plug was the starting choice today and I ended with the OS8. The inner coils in the MC59 plug were compressed pretty bad which if I remember correctly means too much compression?
Anyway, power is weak at best from 0-1/2 throttle, stalls inexplicably and tune is muddy to keep it below 260F.
Any tips? Or should I just give it more time? I notice I can still feel a heavy mechanical pinch with the GP out, even when at temp.
But, I figure I might as well see what I can do to make it a little more friendly to run. It probably has about half-3/4 gallon through it including 9 tanks of a heat cycle break-in.
I was with the original owner through the break-in process and every time he ran it after that, which wasn't much.
I ran it the first time yesterday morning prior to doing anything to it just to get a feel for it. It ran pretty bad and I can see why the previous owner was really frustrated with it. If it wasn't tuned overly rich, it would lean bog and just stall for no reason while on the gas. It would also do a weird idle that wouldn't step down once the engine was warmed up. I tuned to keep it below 260F. Regardless of tune, the weird idle wouldn't go away and frequent stalls would occur when on the gas. It also didn't like to idle well at all.
So, I tore it apart yesterday afternoon and sealed it up with RTV. The carb neck, banjo fitting, backplate, carb cinch bolt, LSN threads. I also retapped the starter housing for 3mm instead of what was in it. Put it all back together and took it out today. I had much better results today, but I only had a small spot to run it in due to rain. I ran it in a 60 foot square pavilion at a park with an occasional romp across a parking lot when the rain let up.
Even though it's "better", it's still not an engine I'd give to an enemy. Power is sub-par for what I was expecting, tune is still muddy. It idles well now and no longer has the weird idle that won't drop and it opens up to WOT pretty well if I don't let it sit and idle for more than 15 seconds or so. I still had frequent stalls when on the gas, which I just have never had before. Like 2/3 throttle, then dead. No weird sound, no fluctuation, just flat out stall.
I'm running 25% fuel with an OS8 plug and an MC59 plug. The MC59 plug was the starting choice today and I ended with the OS8. The inner coils in the MC59 plug were compressed pretty bad which if I remember correctly means too much compression?
Anyway, power is weak at best from 0-1/2 throttle, stalls inexplicably and tune is muddy to keep it below 260F.
Any tips? Or should I just give it more time? I notice I can still feel a heavy mechanical pinch with the GP out, even when at temp.
