Well late yesterday afternoon I finally got a chance to investigate the B&S engine "bang". I removed the head and saw the valves (very coked) operate as required but the piston she no move. Removed the engine from the 45 chasis and attempted to removed the crankcase side cover, Came away enough to look inside and removed the "loose" pieces but cover is still hanging on i.e the bearing in the casing and onto the shaft - probably needs a puller, right guys?
Anyhow, the conrod big end has snapped off the rod and broken into 6 pieces, and it looks like a bit of marking/roughing on the crankshaft journal surface so probably needs a crankshaft regrind as well as a new conrod and crankcase gasket. Prob good to put in new rings (after checking the bore for needing to hone to oversize). Ugh!
As Grumpy says if you had to pay the mower shop ($85 plus /hr) it would not be worth it. Even my contact with a machine shop will prob charge me $100 to regrind the crakshaft and extra to do the bore. Don't know yet what the parts here cost but in the US i see that B&S charge $17 for the conrod, $15 for rings, and even only $81 for a complete new crankshaft. But even at those prices (plus freight) it builds up then with machining. The thing is the new engines are so cheap over there - large Briggs & Stratton 900 Series 205cc Engine at just $229.95, see
http://partsnationwide.com/shop/product-detail.aspx?pc=10&sc=30&p=17963 but all I need is a 97 cu inch (150cc) and I think the model is 097302-0017 model which has a 5/8" keyed output shaft and the same mounting holes and drive shaft height as the present 80202. Will have to hunt a price for that one. Any comments or better info on this situation guys?
