Hello,
Second thread I've made here. I'm gearing up to do some light modification to my HM80 in a few months and am doing my research into what I need for what I'm doing to it. This will be some very light modification as I don't intend to really make it a screamer of an engine. I really just want to de-govern it when I have it apart for refurbishment and determining other parts I may need to replace/clean internally. In the process of doing this I'm going to change the connecting rod out to a billet one, likely the HM100 ARC racing rod since I'm not able to source a STAR rod. This is to increase reliability mostly since the OEM rods are a big fail point for Tecumseh engines.
The two parts I'm having trouble sourcing are a set of 18 lb springs and a flywheel. I've read about people taking Briggs springs and modifying them though and might have to go that route. Any help such as spring sizing or direct sources, and tips/advice with this would be much appreciated.
Obviously, depending on the condition of the internals of this engine, there may well be additional work to do things like hone the piston chamber/replace valves. Typical refurb items like reseating the valves and all new gaskets and piston rings will be done. I figured that since the engine will be taken 1/2 apart just for cleaning the outside to blast/repaint it I should give it a refurbishment and a few fixes to keep it reliable.
The specific engine serial is HM80-155026 if that helps any.
Second thread I've made here. I'm gearing up to do some light modification to my HM80 in a few months and am doing my research into what I need for what I'm doing to it. This will be some very light modification as I don't intend to really make it a screamer of an engine. I really just want to de-govern it when I have it apart for refurbishment and determining other parts I may need to replace/clean internally. In the process of doing this I'm going to change the connecting rod out to a billet one, likely the HM100 ARC racing rod since I'm not able to source a STAR rod. This is to increase reliability mostly since the OEM rods are a big fail point for Tecumseh engines.
The two parts I'm having trouble sourcing are a set of 18 lb springs and a flywheel. I've read about people taking Briggs springs and modifying them though and might have to go that route. Any help such as spring sizing or direct sources, and tips/advice with this would be much appreciated.
Obviously, depending on the condition of the internals of this engine, there may well be additional work to do things like hone the piston chamber/replace valves. Typical refurb items like reseating the valves and all new gaskets and piston rings will be done. I figured that since the engine will be taken 1/2 apart just for cleaning the outside to blast/repaint it I should give it a refurbishment and a few fixes to keep it reliable.
The specific engine serial is HM80-155026 if that helps any.
