chev0545 231 #1 Posted May 26, 2023 (edited) is there a adj.screw on the 520 carb it's a 96 thanks Edited May 26, 2023 by chev0545 1 Share this post Link to post Share on other sites
SPINJIM 1,978 #2 Posted May 26, 2023 Yes, but it's very difficult to get to. It's hidden behind the muffler bracket. Some of the brackets have a hole drilled in the middle so that you can put a screwdriver through to reach it. I had to drill a hole in mine. Either way, you have a good chance of burning your knuckles on the muffler while you're doing it. good luck. Jim 3 Share this post Link to post Share on other sites
lynnmor 6,770 #3 Posted May 26, 2023 Harbor Freight has some real long screwdrivers. 3 Share this post Link to post Share on other sites
chev0545 231 #4 Posted May 28, 2023 On 5/26/2023 at 1:26 PM, SPINJIM said: Yes, but it's very difficult to get to. It's hidden behind the muffler bracket. Some of the brackets have a hole drilled in the middle so that you can put a screwdriver through to reach it. I had to drill a hole in mine. Either way, you have a good chance of burning your knuckles on the muffler while you're doing it. good luck. Jim the 96 doesn't have one just the idle screw.thinkin they just on the earlier 520's Share this post Link to post Share on other sites
lynnmor 6,770 #5 Posted May 28, 2023 8 minutes ago, chev0545 said: the 96 doesn't have one just the idle screw.thinkin they just on the earlier 520's I think it was in 1996 that the idle mixture screw was sealed, it may have been a mid year change when they went to the accelerator pump carburetor. You may find a welch plug where the screw used to be and it can be knocked out revealing the adjustment screw. There are 2 plugs on the muffler side, a larger one above a smaller one, the screw should be behind the smaller one. Knocking out both of them allows complete cleaning of the carburetor, just be sure to have spares on hand for the larger one. The official service procedure for problems with these carburetors was to replace the complete unit. 1 Share this post Link to post Share on other sites
chev0545 231 #6 Posted May 29, 2023 2 hours ago, lynnmor said: I think it was in 1996 that the idle mixture screw was sealed, it may have been a mid year change when they went to the accelerator pump carburetor. You may find a welch plug where the screw used to be and it can be knocked out revealing the adjustment screw. There are 2 plugs on the muffler side, a larger one above a smaller one, the screw should be behind the smaller one. Knocking out both of them allows complete cleaning of the carburetor, just be sure to have spares on hand for the larger one. The official service procedure for problems with these carburetors was to replace the complete unit. never knew that.thanks for the info.it doesn't run bad just a little rough maybe i'll leave it be. Share this post Link to post Share on other sites
