the starter has a small chain sprocket on the output shaft (when the started is installed in the engine) and that chain drives another sprocket that it attached to the sprage clutch. The sprague clutch is simply a one way clutch that has spring loaded rollers (3 i believe) that have tapered ramps. when the started turns the chain and sprockets the inner portion of the sprague clutch. This forces the rollers, with the help of the springs, down the ramps and they tighten around the sprocket. this makes the started tied to the engine rotating mass (specifically the rotor) Once the engine starts the rotor turns faster than the started and clutch releases. WHEW!!
Now in this case, the rollers are sticky from oil that has dried partially or has gummed up around the sprague rollers. Seafoam will help this as well as the detergents in fresh oil and engine heat. The unfortunate part of this is that oil in that part of the engine is only delivered by splash lubrication. This is the reason that it takes many miles and heat to break up this residue.
I hope this help explaine your issues.
Now in this case, the rollers are sticky from oil that has dried partially or has gummed up around the sprague rollers. Seafoam will help this as well as the detergents in fresh oil and engine heat. The unfortunate part of this is that oil in that part of the engine is only delivered by splash lubrication. This is the reason that it takes many miles and heat to break up this residue.
I hope this help explaine your issues.
