Jonsereds 70E build

[Chainsaw Jim]

@Heffalump.. Here's an 8 tooth run Dave. I did some more port work and opened up the muffler. Same chain untouched.

 

[Frank bierce]

@Heffalump.. Here's an 8 tooth run Dave. I did some more port work and opened up the muffler. Same chain untouched.

That thing sounds good..and runs good!! They are such a beefy looking saw!!

 

[Heffalump]

2 to 4 seconds faster. Impressive.

Sounds awesome! I love that exhaust note. Do you like it better with the 8pin?

 

[sawfun]

Nice job Jim. That 70 sure seems to rev a good deal quicker than it did stock. Now that saw will sure beat my 700. Oh he'll, does that mean I need to bring you my 700 .

 

[Chainsaw Jim]

2 to 4 seconds faster. Impressive.

Sounds awesome! I love that exhaust note. Do you like it better with the 8pin?

I'll run a few cuts tomorrow with a 7 tooth to see how it compares.

 

[5000+]

70E's and even the smaller 56cc 621 came with 8 tooth stock.

 

[Chainsaw Jim]

70E's and even the smaller 56cc 621 came with 8 tooth stock.

That must have been why they were so popular and dominated the market.

 

[Heffalump]

Pretty sure they both wore no longer than a 20" bar from the dealer. That 24" might really take some leaning-into with a 7pin, especially seeing how ballsy it was with the 8pin.

A very serious machine......

 

[bplust]

That's a good start, but if you want to change to that newer ignition you will still need a cylinder. The early ones don't have the coil mount on them. Also, if looking for a plastic fan, remember a 621 fan will work; they are a bit more common.

I never knew there were 621's with plastic fans.

 

[awol]

No, they're aluminum but they still work on the early 70. I think I ended up using the ignition unit from the 621 also; it's been a while!

 

[Chainsaw Jim]

I just wasn't quite happy with this thing so I went back in and did some more work on the transfers. I'd say I hit the spot on this old dog. Lol

 

[Frank bierce]

I just wasn't quite happy with this thing so I went back in and did some more work on the transfers. I'd say I hit the spot on this old dog. Lol

That Jonsey is running really well Jim. Nice work!!

 

[zero_sum]

Nicely done! Sounds great. I'd like to do that my 90 some day.

 

[Heffalump]

PM sent......

 

[Gim182]

Hello Gents,
Could youhelp to me in this chainsaw repairing?
I have a 36 years old one an now the ignition module has broken. Where can I get a new one or a useable one. Or do you have idea for repairing? It is an electrical one but it has ful filled with plastic.
Any idea or drawing or photos what is inside or what is the position for it?