The same tank was used on all Evinrude & Elto Speeditwins through the ’30s & 40s’. However in 1939 they did away with the stainless steel drum muffler and came out with a cast aluminum muffler model. These tanks have shorter rear brackets for the new muffler, but can be used on the older models with an adaptor.
OK – I will try again (I hope the third will be a charm) the first two disappeared when I hit the [SUBMIT] button –
This is an assortment of parts books to try and cover what you need for your Speeditwin.
Eat/y parts books were copies of pictures – like this – 1931
In the late 1930s they started using copies of blue prints – this in 1941
and these from1948.