NorthofSixty
Active member
I am rebuilding a 1990 ET400TR and I am ready to reassemble the bottom end. The crank had a couple of wraps of what looks like teflon tape around the labrynth seal when I tore it down.
Years ago I was told by a Yamaha tech that this was the factory fix for early ET340's. I am assuming there was leakage between the case and seal on early models.
Can anyone confirm this. If it was due to leakage is there any reason I could not use a small amount of aviation sealant between the case and seal rather than teflon tape?
Years ago I was told by a Yamaha tech that this was the factory fix for early ET340's. I am assuming there was leakage between the case and seal on early models.
Can anyone confirm this. If it was due to leakage is there any reason I could not use a small amount of aviation sealant between the case and seal rather than teflon tape?
Please explain some more about this "aviation sealant"NorthofSixty said:
NorthofSixty
Active member
It is made by Permatex and the proper product name is:
FORM-A-GASKET sealant liquid No. 3H
It is for use on most types of gaskets, machined surfaces and screw threads for airplane and automobile engines.
I have always used it in place of Yamaha Bond #4 & #5 to seal gaskets and crankcase halves. Here's the TDS http://ecx.images-amazon.com/images/I/71QGd47zJIS.pdf
It is not a silicone product.
FORM-A-GASKET sealant liquid No. 3H
It is for use on most types of gaskets, machined surfaces and screw threads for airplane and automobile engines.
I have always used it in place of Yamaha Bond #4 & #5 to seal gaskets and crankcase halves. Here's the TDS http://ecx.images-amazon.com/images/I/71QGd47zJIS.pdf
It is not a silicone product.