Have an older 1983 (Metal Chain Brake Lever) Husqvarna 266SE since new. After sitting in the weather for an extended period of time ( I know...I know....) it's now difficult to pull. Nothing to do with the recoil starter....the sensation when trying to start it is that it has much more compression. Runs fine. Is now an absolute bear to pull. Any thoughts? Also... Is the chain brake / clutch cover assembly interchangeable with the newer version which has a plastic lever? The old style brake band is no longer available. Many thanks!