I have an Optimax 225 engine which is the long shaft model. However I have cavitation problems when not running at high speed. I have done a lot of investigation into this and the only solution would appear to be a longer leg/shaft. I need to install an extra long shaft onto the engine but my local engine dealer says that there is not a conversion kit available, his only solution is a new engine
I am a mechanical neanderthol and have no argument against this.
If any of you can offer specific mechanical advice I would appreciate it.