RE: SPE 40cc
I just looked on eBay and there are two WT540 carburetors so go get them:
[link]http://cgi.ebay.com/Walbro-WT540-diaphragm-carb-for-lawn-equipment-NOS_W0QQitemZ7773994277QQcategoryZ85915QQrdZ1QQssP ageNameZWD1VQQcmdZViewItem[/link]
And
[link]http://cgi.ebay.com/New-Walbro-Carburetor-WT540-Free-S-H_W0QQitemZ140009401512QQcategoryZ85915QQrdZ1QQssP ageNameZWD1VQQcmdZViewItem[/link]
There is also another carburetor (not the WT 540) for this engine at:
[link]http://www.brillelli.com/brillelli_004.htm[/link]
for $14. The diameter is smaller than the WT 540 but it should be ok for you to get an rpm gain.
You can reed a review for the WT 540 at:
[link]http://tech.flygsw.org/g26anatomy2.htm[/link]
For parts for SPE40 look at [link]http://www.himodel.com/engines/spare_parts_2156.html[/link]
You can download a good manual for the SPE40 at:
[link]http://www.himodel.com/en/info/manual/SPE-40CC_manual.pdf[/link]
This is the Walbro site with a list of all the carburetors:
[link]http://wem.walbro.com/walbro/group2.asp?FamilyName=WT[/link]
You can get a good ignition for $80 at:
[link]http://www.copperheadaviation.com/[/link]
He does not have them listed but he has them.
Another place to get the ignition is at:
[link]http://www.bcmaengines.com/BCMAProducts.htm[/link]
You can always spend more money and get a CH but the ignitions that I’ mentioning they are excellent and have a very good reliable track record.
I hope this helps you
Take care,
Eric