Mornin I have a T-300 that just replaced the complete pump due to broke coupler. All functions work ....But when the travel leavers are moved to full speed forward or reverse it will drag the motor down to a stall condition. if you move them to 3/4 position the units is fine
thats weird. do you have a manual to look in? mine would bog easily til I adjusted the injection pump up a little, but I'm not sure thats your issue.