Tomatodave 7 #1 Posted August 28, 2020 (edited) 1988 310-8. Engine cuts out/ bogs down in 2nd only slopes to the right. Can put in 1st gear and engine does not miss a beat. Is this a float issue? Or carb. Any insight? thanks! walbro carb. Is this a fixed jet or adjustable jet? What should those settings be for those 2 screws? Edited August 28, 2020 by Tomatodave Add photo 1 Share this post Link to post Share on other sites
AHS 1,524 #2 Posted August 29, 2020 There is an idle screw and a low speed screw... I believe the hi is fixed? Have you replaced the fuel filte, and also the one in the tank? It might be a carb issue. Share this post Link to post Share on other sites
johnnymag3 2,566 #3 Posted August 29, 2020 (edited) The screw thats behind the butterfly flapper is the idle speed screw....The other screw is the low speed / idle/ air screw..... There is no high speed adjustment on that carb, its a fixed jet Edited August 29, 2020 by johnnymag3 Share this post Link to post Share on other sites
Tomatodave 7 #4 Posted August 29, 2020 So in the pic the screw(on horizon) on the left is the idle speed screw? and screw on right is low speed / idle ? to AHS. This tractor has no fuel filter / maybe it should. I have recently replaced fuel pump / gasket on carb bowl and on/off valve on the gas tank tractor starts up fine. Runs fine but it sounds like it’s missing or coughs little when I’m on downhill grade and angled to the right the engine cuts out and I have to mess w choke and throttle What should I set those screws to before adjusting? Both at 2 turns? thx Share this post Link to post Share on other sites
pfrederi 18,579 #5 Posted August 29, 2020 Carb settings including float level are all in this manual. 2 Share this post Link to post Share on other sites
Sparky-(Admin) 22,966 #6 Posted August 29, 2020 There is a fuel “fine screen“ filter in the tank, it’s part of the shutoff. I just swapped one out in a 312 yesterday. The filthy one was still working but sometimes the Magnum 12 seemed to be starving for fuel. So new tank shutoff, all new fuel hoses front to back and I installed an in-line filter as well. Mowed yesterday and it’s much better 3 Share this post Link to post Share on other sites
953 nut 59,410 #7 Posted August 29, 2020 Have you put in a new spark plug? 1 Share this post Link to post Share on other sites
AHS 1,524 #8 Posted August 30, 2020 If you have to mess with the choke.... take the carb off and clean it. Share this post Link to post Share on other sites
Tomatodave 7 #9 Posted September 7, 2020 Thanks everyone here for all your help. This site is very useful. Got the beast running real well but got another real problem yesterday when mowing... frame cracked down near gear box... had noticed a crack a few weeks ago up under seat but did not notice frame cracks down below. Was able to get into all gears however reverse would not allow me to stop?? Will show pics later. I’m hoping I could get welded. 1 Share this post Link to post Share on other sites
953 nut 59,410 #10 Posted September 7, 2020 Frame cracks at the transmission plate are not all that uncommon. Here is a picture of a repair one of our members did. Share this post Link to post Share on other sites
Tomatodave 7 #11 Posted September 8, 2020 Thanks nut... attached are pics of the damage. 1&4 are cracks right below the seat/ where bolts in and other 2 are cracks at each side down near tranny box ouch! Share this post Link to post Share on other sites
