Hello to new hope!
My 13 hp B&S mower engine suddenly started exhausing white smoke and a teardown showed accumulated carbon build up. The valves were lapped but the engine only backfired on reassembly and failed to run. A second repair shop found evidence of lapping pumice at disassembly and promplty decided the engine was ruined in spite of the fact it had run well before the white exhaust and the cylinder walls look great. They also say B&S has no replacement engine!!!
Attempts to check valve sealing and timing have been frustratied by my inability to remove valve compression spring keyhole retainers. The intake valve retainer appears to use a centering cover that must be lifted (but HOW?) before removing the keyhole retainer. Do I have to buy (and wait for) a special spring compression tool, or is there another way?
My 13 hp B&S mower engine suddenly started exhausing white smoke and a teardown showed accumulated carbon build up. The valves were lapped but the engine only backfired on reassembly and failed to run. A second repair shop found evidence of lapping pumice at disassembly and promplty decided the engine was ruined in spite of the fact it had run well before the white exhaust and the cylinder walls look great. They also say B&S has no replacement engine!!!
Attempts to check valve sealing and timing have been frustratied by my inability to remove valve compression spring keyhole retainers. The intake valve retainer appears to use a centering cover that must be lifted (but HOW?) before removing the keyhole retainer. Do I have to buy (and wait for) a special spring compression tool, or is there another way?