Rowjr70 0 #1 Posted December 17, 2025 I have a 1984 work horse GT1800 that I recently purchased. I need to replace the muffler. The Briggs part number is 491307S. Does anyone know how to install this? It does not come with any mounting hardware. Any help would be appreciated. Share this post Link to post Share on other sites
ebinmaine 77,323 #2 Posted December 17, 2025 Here's a thread from us doing a partial disassembly on one for our friends. There'll be a bunch of pics. Should find what ya need. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,998 #3 Posted December 17, 2025 Wonder if there is anything in the service manual? Share this post Link to post Share on other sites
Wild Bill 633 907 #4 Posted December 18, 2025 Unable to post picture due to MB restrictions, but the B&S Accessories Catalog shows Muffler P/N 491307S by itself and (2) Adapters, P/N 691970 required, which includes the adapter, gasket and screws. Spark Arrestor P/N 392390 is also available. Share this post Link to post Share on other sites
953 nut 64,106 #5 Posted December 18, 2025 1 hour ago, Wild Bill 633 said: Unable to post picture due to MB restrictions If you became a supporter of Red Square that little problem would go away. 1 Share this post Link to post Share on other sites
Wayne0 1,509 #6 Posted December 18, 2025 I did mine a couple years ago. A lot of tin has to come off. Pay attention to all the screws. You can re-use the adapters. The pipes just slip over them. Labor intensive, but not difficult. Share this post Link to post Share on other sites
