Dennis C. 142 #1 Posted July 22, 2021 First, I would like to thank all the people that have given me help with my issues on this WH for the past 2 mowing seasons. Now I have to decide if this is a lost cause or what. Without a data tag I can only assume this is a 1987. Whoever owned it before really butchered the tractor. So I spent lots of $$$$ fixing what I found. The hood decal was cut up and sticky numbers were put in place with the numbers 312-8. Really didn't notice any of this until I started finding the different issues. In one of my last post I mentioned a occasional miss when warm. Seemed to go away once I richened the carb at idle. Still, the engine has lots of vibration. My neighbor has an original 310-8 and the engine runs like a Swiss watch and no vibration. Here is my question, Are the frame rails different from the 308-8, 310-8 and 312-8? I looked at my engine today and 2 mounting bolts are located correctly in the frame but the mounting plate holes near the PTO are off the frame and the engine is bolted to the frame by the engine sump bolts. Is this normal? At this stage in the game I'm not going to invest money in engine repairs if this tractor is a lost cause. Thanks 1 Share this post Link to post Share on other sites
Jeff-C175 7,202 #2 Posted July 22, 2021 Hi Dennis, Pictures would definitely help! Share this post Link to post Share on other sites
JAinVA 4,619 #3 Posted July 22, 2021 (edited) The frames for the 300-400 and 500 series tractors are the same. The only difference is an extra pair of holes drilled for the 4 bolts that secure the steering block on 520 tractors with gear reduction steering. The mounting bolt locations for the single cylinder Kohler engines are what you are describing and are correct. Edited July 22, 2021 by JAinVA 4 1 Share this post Link to post Share on other sites
Dennis C. 142 #4 Posted July 23, 2021 Thanks Jim. I tried to locate pictures on the internet of the engine set up but no luck. Now, will I have to drain the engine oil to remove the engine since 2 of the bolts secure the engine to the sump? Thanks Share this post Link to post Share on other sites
Racinbob 11,100 #5 Posted July 23, 2021 18 minutes ago, Dennis C. said: Thanks Jim. I tried to locate pictures on the internet of the engine set up but no luck. Now, will I have to drain the engine oil to remove the engine since 2 of the bolts secure the engine to the sump? Thanks No Dennis, you don't have to drain the oil. Those two holes are blind so they don't go all the way through. 2 Share this post Link to post Share on other sites
