Newer Tecumseh, Older Carb

[furyus]

This engine is on ebay tight now:

Vintage 3.5 H.P TECUMSEH Minibike Engine NEW - eBay (item 120661422728 end time Dec-23-10 18:44:12 PST)

Can I take the stock 1970 diaphragm carb and exhaust off my 3/12 and use them on this engine? Are older shrouds compatible with the newer engine?

I'd love a new motor that still looked somewhat correct. It's for my 70 Sprint.

Thanks.

furyus

 

[The Restore Kid]

Yes, the stuff should interchange to some point.. The intake should work, but sheet metal depends on the flywheel style.. It LOOKS as if that one has the aluminum flywheel and SHOULD give you the clearance to get YOUR shroud on it... ALTHOUGH the starter mechanism is different and you will most likely have to fabricate a starter cup to make the old ratchet work in the newer cup... You will have to change the backer plate that the shroud mounts to with your throttle stuff, and that may have a different bolt pattern, BUT you can probably just drill out the rivits from your backing plate, then bolt the throttle assembly to the backing plate of the new engine... Anything is possible with enough :hack:ing.. But yeah your base of a block should be about all the same..

 

[The Restore Kid]

Actually after looking closer it's probably an iron flywheel.. The depth on those is deeper and might not clear the shroud... We kinda need a different pic from the front, bottom, kinda lookin up... :laugh:

 

[furyus]

Yes, the stuff should interchange to some point.. The intake should work, but sheet metal depends on the flywheel style.. It LOOKS as if that one has the aluminum flywheel and SHOULD give you the clearance to get YOUR shroud on it... ALTHOUGH the starter mechanism is different and you will most likely have to fabricate a starter cup to make the old ratchet work in the newer cup... You will have to change the backer plate that the shroud mounts to with your throttle stuff, and that may have a different bolt pattern, BUT you can probably just drill out the rivits from your backing plate, then bolt the throttle assembly to the backing plate of the new engine... Anything is possible with enough :hack:ing.. But yeah your base of a block should be about all the same..

It does look like the same block, and the manifold appears similar, as does the exhaust bolt pattern. Hard to tell when you've got an engine in one hand and a picture in the other. Seems folks always shoot their pics just a few degrees off of what you really need to see! I never really cared for the later shrouds compared to the older ones, but it isn't an absolute deal killer. You're right - anything can be done depending on the effort. I was ready to hit the "buy it now" button, but the dude jacked his price up from $300 to $395, and that made me reconsider.

Thanks for taking the time.

furyus

 

[Rockwall]

The "buy it now" is gone ...

 

[supernova]

The "buy it now" is gone ...

He was informed that the 1970s talk was confusing and told the engines were 1984 models and not worth as much given that fact. I would imagine it changed his strategy some, I wonder who would have told him that? :anon.sml:

 

[The Restore Kid]

It does look like the same block, and the manifold appears similar, as does the exhaust bolt pattern. Hard to tell when you've got an engine in one hand and a picture in the other. Seems folks always shoot their pics just a few degrees off of what you really need to see! I never really cared for the later shrouds compared to the older ones, but it isn't an absolute deal killer. You're right - anything can be done depending on the effort. I was ready to hit the "buy it now" button, but the dude jacked his price up from $300 to $395, and that made me reconsider.

Thanks for taking the time.

furyus

Yeah screw him.. :hammer: Thats too much for a 93 rototiller engine.. You would have to change the crank, cut threads into the block for your original coil to work... It's done.. Let the guy dream.. :laugh: