I have just rebuilt a small boat which has a Lister SL1 single cylinder air cooled diesel for motive power. The engine is coupled to a Lister SL3 gearbox (Forward / Neutral / Reverse) and then direct drive to the prop. The gearbox has been rebuilt using only the exploded parts diagram as a reference. My problem is that engaging reverse causes deadful granching noises, a few reverse revs of the prop but quickly drags down the engine and would stall it if allowed.
The gearbox is fairly simple and is, I'm fairly sure, reassembled in the right order.
My question to the group is, does anyone out there have knowledge, or a manual to refer to, to check the setting of the large nut on the final output flange?????
At the moment its done up tight. One suggestion has been made to back this nut off and use it to set a clearance setting on the ahead clutch. My fear is that this would introduce some end float into the shaft which may cause damage to the bearings. Before I go ahead to giving it a try it would be helpful if I could get confirmation of what my advisor admits is a faint recollection of a distant memory?
Any help would be appreciated, or if you don't know, but could refer me to a man that might, I will follow up on any leads.
Regards to all Stu Knowles Doncaster
Should perhaps say that vintage engines are not my subject so don't hesitate to suggest the obvious, it's probably news to me!