IH 2400 Series B Industrial 4cyl gas - runs like a fine watch when cold - sputters, misses sometimes dies when at operating temperature with any kind of load at PTO rpm. Done so
far : rebuilt Marvel carb...emptied and cleaned fuel tanks and outlets... checked accuracy of in hose thermostat in hot oil...replaced points, plugs and condensor... replaced coil
with hotter version...replaced plug wires with pre-mades...reset valve clearances... reset timing... removed magnetic inlet valve from carb and replaced with a new manual
version...replaced bad bearing in governer...replaced fuel line... replaced ignition switch... repaired underhood suspicious wires...confirmed operating temperature at 180 - 190
degrees using heat register gun...
...noticed very slight movement/play in timing gear when working on governer...plenty of fuel in carb...new fuel pump 100 hours or so ago...
This tractor has us stumped. Starts immediately when cold. Runs perfectly with good power and no black smoke when cold > operating temp. Once it hits 180-190 temp with any load (in
this case a 5' bush hog) or a bucket full (tractor has an IH 2500 loader) tractor misses, cackles, sputters and most often dies. Starts right up when allowed to cool down. We did
notice that the distributor clamp changes the engine performance when clamped down hard - doesn't change when clamp is just snugged.
It seems heat related? What component are we missing that might be affected by heat and would lead to poor performance?
Thanks for any advice you may offer...
far : rebuilt Marvel carb...emptied and cleaned fuel tanks and outlets... checked accuracy of in hose thermostat in hot oil...replaced points, plugs and condensor... replaced coil
with hotter version...replaced plug wires with pre-mades...reset valve clearances... reset timing... removed magnetic inlet valve from carb and replaced with a new manual
version...replaced bad bearing in governer...replaced fuel line... replaced ignition switch... repaired underhood suspicious wires...confirmed operating temperature at 180 - 190
degrees using heat register gun...
...noticed very slight movement/play in timing gear when working on governer...plenty of fuel in carb...new fuel pump 100 hours or so ago...
This tractor has us stumped. Starts immediately when cold. Runs perfectly with good power and no black smoke when cold > operating temp. Once it hits 180-190 temp with any load (in
this case a 5' bush hog) or a bucket full (tractor has an IH 2500 loader) tractor misses, cackles, sputters and most often dies. Starts right up when allowed to cool down. We did
notice that the distributor clamp changes the engine performance when clamped down hard - doesn't change when clamp is just snugged.
It seems heat related? What component are we missing that might be affected by heat and would lead to poor performance?
Thanks for any advice you may offer...
