Good luck, I bought a 10525 off a dealer that was sitting out side for a number of years, had spark and I gave him 25 bucks, cleaned carb and it ran for about 2 hours, connecting rod bearing let go due to rust. I thought now what, got on here found out that you can get short blocks off ebay, Long story short, bought a short block for 75.00. So for 100.00 or I ended up with a new 2-stroke mower. And not to mention a wealth of knowledge on how LB go together and work.