@Grub54891 volvo penta does not use a shift interupt switch, they have a cone clutch
@timmy262003 your motor will rev to 5000 RPM in neutral running on 2 cylinders being fed by a drop of fuel.
however under load you need all 6 cylinders being fed a lot of fuel.
what is the story behind your 28 year old boat. is this new to you , or a boat you had for a long time with a new prob. The motor is pretty much new just been used four times I think it is the switch because it doesn't act right and it doesn't want to go into run mode from the switch it stays in start that's why it stalls when I put it into gear my best guess order the new switch will be here in a couple days