Re: Cheap bastich oil change 25hp
I do fill mine from the top but I have the syringe shown below. The nozzle is small enough to fit right through the vent hole and air locking is never a problem.
It is still a tedious method as the gearcase holds 325cm? and the syringe only about 75 cm? however I had the syringe and I don't have a pump. ( I dread to think how much a pump will cost in the UK!)
It has the advantage that it is not uniquely sized to fit any particular make of gear case.
I'd not particularly recommend it but it works for me and is better than using a squeezy tube in the bottom hole.
If you have a similar syringe knocking about go for it ... otherwise splash the cash on a pump.