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You’d probably have to prowl forums on Smokstak to find any references to parts diagrams for those old Tillotsons. All I’ve ever found was a reference list that was an application chart showing the various engines that the Tillotson carbs of that era were used on. Your best likely option is good advice and also making notes of what parts are located where as you’re disassembling things.
The threads can be revitalized, but its tricky. I’ve gotten it done by cleaning the threads in both the carb and the mating part, then applying a layer of JB Weld to the female threads while coating the male threads with light oil before inserting the part into the carb. When the epoxy cures, the oil on the threads prevents it from sticking, and if the planets are aligned for you, the male part just unscrews and leaves the cured JB Weld in the threads. An alternative fix is to make a fitting that is about 0.005″ oversized on t he threads and screwing that into the carb, but obviously you need a lathe to do that.
FWIW I don’t like what I see on the throttle lever quadrant, it looks like the zinc allow is flaking, unless that’s just paint. The quadrants are also zinc allow and prone to the corrosion problem that I wrote about in a separate post. To be honest, you’ll be better off with an MS-45 series carb, as they were made in the 30’s and have as good a record of longevity as these ones do have a bad record of crumbling.
Best,
PM T2He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...
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any good for u ?? see A series
Tillotson asks owners to contact them for older models.
Joining AOMCI has priviledges 🙂
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I would take a very careful look at all parts of the carb before I committed to using it. There are likely other issues besides the one you found. The 1927 versions of Tillotson carbs are notorious for falling apart, including the levers and quadrants. You might consider looking for one from a later Neptune twin.
T
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While some early MS-3 & MS-4 series carbs have survived they are very fragile and threads strip out easily. Look for the MS-45 A through H series carbs. The MS-45-A carb was used in the early motors but if you find one its most likely from the later years . Most early ones have failed and been discarded but if you find an A look it over carefully for cracks. Epically the float bowl cover. What you may have trouble finding is this fuel line connection that Fvinrude used. It crumbles like the carb. There are several different ways it was done. There are later Neptune’s that use the “E” connection. I don’t know which model .
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
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