*I have a video of the gearbox in a link at the bottom.
So I bought this boat last fall and I need some help fixing the gearbox. The boat has a Coventry victor WD3 engine (1938), and a Perfekta no. 5 gearbox, I can find very little on this gearbox so it makes it more difficult to fix myself.
Do you have any advice on how I can clean the gearbox, because in the current state it looks very dirty and rusty, and I don't think is good for running it. Of course I will fill it with the proper oil when running it but I would like it a little cleaner before using it. I thought of letting it sit in diesel for 2 hours but I don't know for sure if that is the right thing to do. Do you have advice on cleaning the gearbox.
Secondly, I ran it for a little while a few months ago and it I noticed it wouldn't properly enter neutral gear unless I forced the prop shaft stuck. Otherwise the prop shaft would spin along even in neutral. I looked around the internet and found that often some bolts have to be adjusted, but I don't know which. Do any of you know how to fix this issue.
I only have the video below of my gearbox, but I have also posted the manual and blueprints I have found on the internet.
If I was unclear in any of my explanations, I apologize, please comment if you have questions or want clarification. Thanks in advance.
https://imgur.com/a/RJrvW2w
keerkoppeling blueprints.pdf