Re: My Boat topic was deleted so I am stating a new one. BOAT AND ENGINE CAME
Zodie, just found the missing second oil screw, they are far away to maintain a certain lever/amount of gearcase oil, for better inside gear lubrication. Ok about short shaft engine, don't know what ear muffs are being called in Europe. About Honda flusher port, as said before ask dealer if you will need to close lower tail water intakes so as not to lose water pressure when flushing engine with flush kit while engine is on, don't know Honda engines so to advise properly. If engine has a thermostat you must flush engine on, to give time for the thermostat to open and rinse engine head water passages properly. If doesn't have a thermostst, you don't need, check your owners manual if you need to flush engine on or off.
Seems your flusher port is located at lower tail, next to oil screw as in below examples. If so, just buy the ear muffs. In my particular Tohatsu case, if using the flushing port where green hose is connected, mut seal with ear muffs both lower tail water intakes as not to lose max presure that gives a better inside water rinse throghout the entire water cooling system while engine is on. Have sealed the extreme of my ear muffs so as not to accept a water hose, just acts a as a water retainer while using the flush port with proper Tohatsu adapter.
Being that engine so small won't have issues with excesive speeds as probably mission impossible for boat and engine to come into plane, so don't worry when docking/beaching, while sib still on water with engine on, disconnect engine gas hose, let engine die out of fuel. You don't want to have carb gas remains and have spills inside car while engine is transporting laying sideways back home. After using engine in salt water, you can inmerse tail in tap water in a bucket deep enough to cover complete tail depth, start engine to be flushed in neutral, apply same engine dying procedure as above.
Happy Boating
Engine must be flushed while engine is on as do have a thermostat...