Jerry/MT
Elite Member
- Joined
- Feb 2, 2008
- Messages
- 3,135
- Location
- North Idaho-The Palouse
- Tractor
- New Holland TD95D, Ford 4610 & Kubota M4500
Seems to have good power and runs smooth. Holley Carb had a complete rebuild. Originally, bowl and everything was gummed up and green. I will have to re-check the mixture and plugs.
I did have the lower rad hose collapse, replaced with a new reinforced one. What generally causes that?
A rad hose can collapse just due to the water pump suction as the engine speeds.That's why most lower hoses are reinforced. Some reinforcement is just a coil spring placed in the hose and these can corrode away if the coolant isn't maintained. A restricted rad on the coolant side can also add to the problem.
A missing vacuum advance line will lean the mixture because the air coming through the generally bypasses the carb metering section. Also make sure that the intial timing is correct and the centrifugal advance is working properly. A retarded spark can cause overheating and burn exhaust valves.