Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Jonsered => Topic started by: 3000 FPS on October 15, 2016, 07:43:29 pm

Title: Jonsered 801
Post by: 3000 FPS on October 15, 2016, 07:43:29 pm
I just wanted to post this over here in the Jonsered section of the forum.   
The saw is 80cc and I was told that it is similar to the Jred 80.     I do not know what the differences are myself.
The carburetor is bad and the fuel filter and fuel line is bad.   Replaced the fuel filter and fuel line.   The carb is a Tillotson HS.
I rebuilt the carb and got the saw to run but the idle is all over the place so going to replace the seals.
Cannot find a parts list but I pulled the seal and measured on the PTO side.   15X30X7mm.   A easy seal to find and have one on order.

Title: Re: Jonsered 801
Post by: 3000 FPS on October 15, 2016, 07:46:13 pm
I wanted to show this picture of the oiler and fuel tank vent.
You will notice on the crank there is a cam with a plunger pushing on it.   That is the oiler.   
Then coming out toward the top rear you will see the end of a black rubber fuel line sticking out and that is the tank vent.
Interesting.

Title: Re: Jonsered 801
Post by: mdavlee . on October 15, 2016, 09:11:38 pm
Those are cool old saws.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 16, 2016, 09:35:18 pm
I got the IPL and a service manual compliments of one of our northern members.    Some great information on this saw.    It sure is nice having access to all the resources.   
Title: Re: Jonsered 801
Post by: Cut4fun . on October 17, 2016, 02:16:42 pm
I got the IPL and a service manual compliments of one of our northern members.    Some great information on this saw.    It sure is nice having access to all the resources.   

Very cool.

I have searched for the 801 info before for others in past but never came across the IPL or manuals either. Seemed like a 1 or 2 year made saw here.

Figure out the differences in  801 etc?
Title: Re: Jonsered 801
Post by: 3000 FPS on October 17, 2016, 09:51:45 pm
I think acres listed the saw as being made one year.
Title: Re: Jonsered 801
Post by: HolmenTree on October 17, 2016, 10:27:35 pm
I replaced my 80 with the 801 around 1977 or maybe it was 76. The 801 and 90 were made up until 1979 when the 910 replaced them. The last of the true Jonsereds.
The 801 never cut as good as the 80, something in the porting. 40 years is hard on my memory  :D
The newer 90 got the power back but was to late as my 910 and 920 were quicker and lighter saws.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 17, 2016, 11:19:44 pm
I take that back I looked at acres again and it stated made from1970 and stopped 1980.
Title: Re: Jonsered 801
Post by: Cut4fun . on October 18, 2016, 12:19:49 pm
Dont know how accurate it is. http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/d14fea1a20eeb4f488256b690079a7ec?OpenDocument

Dang 10 years. Here I thought it was only a couple years. LOL
Title: Re: Jonsered 801
Post by: HolmenTree on October 18, 2016, 05:24:49 pm
Nope wrong Mike needs to get that edited. 80 introduced first in the early 1970s then replaced later by the 801.
I'll dig out and post info later.
Title: Re: Jonsered 801
Post by: HolmenTree on October 20, 2016, 01:23:27 pm
Got real busy doing treework after the recent heavy snow storms. Found some time this AM.

Well here's a North American Jonsereds lesson.
As the 6 pics show:
* Scotsco started selling the silver top 80 on the west coast in 1971-72. Rated for a 36"b/c.
*80 and 621  introduced 1970 .
*New and improved 80 with 27 upgrade changes 1974.
*Black top 801 and 90 introduced 1975-76.
*70E in 1978.
*90E in 1979 last of the true Jonsereds.

Title: Re: Jonsered 801
Post by: HolmenTree on October 20, 2016, 02:08:46 pm
I didn't get the date on the 90 ad so here's a full page of the 90 along with info on the black top 801 that replaced the silver top 80.
The silver top and red Jonsereds colors go way back to 1960.


Last pic is Jonserds western U.S. distributor Wendell Walker founder and president of Scotsco Inc. Wendell was a high ranking Oregon Sawchain executive before he and his wife Barbara started the company in Aug.1971.
Inset picture is Jonsereds AB general manager Stig Jenson in his engineering laboratory in Jonsereds,Sweden.
Title: Re: Jonsered 801
Post by: HolmenTree on October 20, 2016, 02:22:31 pm
I'm on a roll here. Niko will love this ;D
This pic is the earliest Jonsereds silver top I can find but Niko may find an earlier pic of a model before 1960.

Here's the 1960 Jonsereds XF 110cc silver top.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 20, 2016, 11:11:24 pm
Wow Holmen that is some great information and I guess there is no arguing with that.    Thanks for digging out that info and posting it.
Title: Re: Jonsered 801
Post by: HolmenTree on October 20, 2016, 11:49:40 pm
Wow Holmen that is some great information and I guess there is no arguing with that.    Thanks for digging out that info and posting it.
Your welcome 3000. From memory starting logging in 1974 at 16, my  first saw was a 621 then a 80 which turned into a 801 and 90 being only available a few years later .
We raced those 80's in power saw contests right up into the early 1980s. Never raced a 801 or 90.

Found a good article from 1975 of what was claimed the first electric heated handles on a saw. Jonsereds 52.
Title: Re: Jonsered 801
Post by: mdavlee . on October 21, 2016, 08:12:47 am
That's awesome info. I think the older Jonsereds are the coolest saws from Europe in the vintage stuff.
Title: Re: Jonsered 801
Post by: HolmenTree on October 21, 2016, 05:49:31 pm
Here's a little more cool Jonsereds history.
The introduction of the 521in 1975 with first on the market electric heated handles.
The 66E introduced in 1976, predecessor of the 70E.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 21, 2016, 09:30:59 pm
I put in a new crank seal on the PTO side of the saw today and the idle is now rock steady with no drifting like it did before.   Now I will order one for the flywheel side and replace it along with some new rubber for the anti vibe on the upper handle.   
I did cut some wood with it today and this thing really does have some power.   I think I will tach it also I am curious about the RPM's on it.

Some awesome information Holmen thanks.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 24, 2016, 07:52:16 pm
Found a 24" bar and chain that fit the 801 and did some more test cutting with it today.   I did some noodles with it today and the saw clears chips pretty good.    I also tached it with the 24" bar and chain on it and at wide open throttle got 12200 rpm's.    I did a compression test and got 170psi which is not bad for the altitude here on the high plains.   I am just waiting on the other crank seal so I can install it and then I will be pretty much done with it.   

Title: Re: Jonsered 801
Post by: Eccentric on October 25, 2016, 02:48:07 pm
You can use D096/D196/UXL and D007 mount bars on these saws.  Usually have to open up the slot with a file a tad, as these bars are 9.5mm (.375") while the original D024 mount bars are 10mm (.400").  Those old JReds are strong.  I've ran a 111S and it was a brute. 
Title: Re: Jonsered 801
Post by: 3000 FPS on October 25, 2016, 03:13:22 pm
I believe the 24" bar I put on the 801 was a D009 mount that I opened up the slot on.   I also drilled the oil holes out a little bigger too.   It mounts good and oils good.
I ran the saw some more today and I am surprised at the power it has.   I really had no idea.
Title: Re: Jonsered 801
Post by: Cut4fun . on October 25, 2016, 03:35:55 pm
Not a clue here. Can you do a video to show us.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 29, 2016, 06:07:18 pm
Here is a video of the J-Red 801.   The log was moving around a lot and would have cut a little better if I had strapped it down.  The chain I did a quick sharpening with the dremel and one of those small round stones.    The wood is some aspen that was cut down a couple of months ago and is still petty green.   The bar on the saw is a 24".     The wind was blowing pretty good also.

https://youtu.be/Lt0M0rt5PWw
Title: Re: Jonsered 801
Post by: Cut4fun . on October 30, 2016, 09:34:39 am
Thanks Roger.

Looks like they will do the job for sure.
Title: Re: Jonsered 801
Post by: HolmenTree on October 30, 2016, 10:48:13 am
Good old saws that were nearly indestructible. Still see a few homeowners running 801 and 90's today as they were big sellers up here back in the day.

I was removing a big poplar for a cottage owner a few years ago and he brings out a 90 with all the decals still on it.
We had a little bucking race side by side. I was using my early edition 372XP.
 He had a brand new 73LPX out of the box, my  LGX was half filed back and sharp.
The 90 beat me soundly :o
Title: Re: Jonsered 801
Post by: 3000 FPS on October 30, 2016, 10:50:36 am
Thanks Roger.

Looks like they will do the job for sure.

I think where this saw will really show its power is in some bigger wood.   I could lean on it pretty good.
Title: Re: Jonsered 801
Post by: HolmenTree on October 30, 2016, 10:55:40 am
Roger they shine in bigger wood. But to add to my above post we were bucking 16"-18" poplar.
You may be sticking a 90 p/c on your 801 ;D
But I remember back in the day the two were very close in power. The early  silver top 80 a little stronger.
Title: Re: Jonsered 801
Post by: 3000 FPS on October 30, 2016, 04:26:55 pm
Holmen this saw is bone stock and still running the spark arrester.    It will have plenty of power for me.    I really do not come up against wood that is bigger than 20" across very often.   Just a cool old saw that you gave us some great history on.   
Title: Re: Jonsered 801
Post by: HolmenTree on October 30, 2016, 07:13:17 pm
When you look throughly at the quality of build these old 'sereds have, it's easy to see they would cost 5X plus to manufacture today.
Men where men back in the day and weight was not an issue, quality of build was.  ;D
Title: Re: Jonsered 801
Post by: mdavlee . on October 31, 2016, 08:00:36 am
Those saws just sound awesome.
Title: Re: Jonsered 801
Post by: SawTroll on November 02, 2016, 10:28:17 am
I'm on a roll here. Niko will love this ;D
This pic is the earliest Jonsereds silver top I can find but Niko may find an earlier pic of a model before 1960.

Here's the 1960 Jonsereds XF 110cc silver top.


As far as I know it is true that the XF was the first silver-top.
Title: Re: Jonsered 801
Post by: SawTroll on November 02, 2016, 10:48:31 am
Nope wrong Mike needs to get that edited. 80 introduced first in the early 1970s then replaced later by the 801.
I'll dig out and post info later.
The fact that Tilton replaced the 80 with the 801 doesn't necessarily mean that the production of the 80 stopped at that point - it is fairly common that "model replacements" vary between markets/distributers. I'm not saying that it didn't happen at the factory as well, just that what Tilton did doesn't prove it did.

Thanks for the attachments, I'll save them!  ;D

Title: Re: Jonsered 801
Post by: SawTroll on November 03, 2016, 06:15:57 am
I believe the 24" bar I put on the 801 was a D009 mount that I opened up the slot on.   I also drilled the oil holes out a little bigger too.   It mounts good and oils good.
I ran the saw some more today and I am surprised at the power it has.   I really had no idea.

D009 is a convenient and easy to find candidate, and they don't call for the nowadays somewhat unusual (and "short" for called length) dl counts that the Homelite etc. bars does.

My impression is that the 10 mm slot of the D024 bars are somewhat "nominal", so I would measure the actual bolts before widening the slot of the bar.
Some saws that came with D024 bolts may have had them replaced by 9 mm D009 bolts as well - late production 9xx/8xx saws actually came from the factory that way, as far as I know.

Basically any bar with a mount that use a "D" tail (in the Oregon system) can be modified/adapted to work.
Title: Re: Jonsered 801
Post by: dutchsawdoctor on November 21, 2016, 09:23:30 am
I'm on a roll here. Niko will love this ;D
This pic is the earliest Jonsereds silver top I can find but Niko may find an earlier pic of a model before 1960.

Here's the 1960 Jonsereds XF 110cc silver top.
this the earliest silvertop i cold find ;)
(http://up.picr.de/27497988ai.jpg)
Title: Re: Jonsered 801
Post by: HolmenTree on November 21, 2016, 11:07:36 am
Very nice dutchsawdoctor . I believe that unit was manufactured right up to about 1969 if I'm not mistaken.
Title: Re: Jonsered 801
Post by: 3000 FPS on November 26, 2016, 07:00:37 pm
Replaced the other crank seal today.    I had already done the other side.    I cleaned the points while I had it apart and moved the plate the points mount to about 1/16 of an inch to give it a little more advance on the timing.   The saw starts and runs great.    The other thing to my surprise is a Mahle cylinder.   Nice.

Title: Re: Jonsered 801
Post by: HolmenTree on November 26, 2016, 08:15:41 pm
They were good quality saws alright. You could order matched P/C in A, B or C.
Title: Re: Jonsered 801
Post by: SawTroll on November 28, 2016, 10:42:02 am
Replaced the other crank seal today.    I had already done the other side.    I cleaned the points while I had it apart and moved the plate the points mount to about 1/16 of an inch to give it a little more advance on the timing.   The saw starts and runs great.    The other thing to my surprise is a Mahle cylinder.   Nice.


As far as I know, the norm on that model is Mahle 52ZN9?
Title: Re: Jonsered 801
Post by: Real1shepherd on December 29, 2016, 08:51:02 pm
There was overlap in the 80 and 801 production....don't go necessarily by Acres. They are virtually identical saws with the same part #'s except for; the top cover, the carb elbow, the AF and AF cover. There shouldn't be any difference between the way a stock 80 runs and a stock 801.

I've had a workhorse 80 going now for 35+ yrs. I've also run some similarly tuned 801's. To the poster who thinks they ported the 801 differently or detuned it somehow, I say nay. I was loggin' in CO when a friend brought a brand new, plastic fantastic 910 to the job site. Let me use it for a day. Great saw...but glad I didn't pinch the bar and yank hard on the rear handle...lol. But the saw wasn't so great that it aced my modded muffler 80 I was using on the site. Needless to say, I didn't feel inclined to race down and buy one to increase production.

Not knocking the 910...I have one waiting to be restored. It just wasn't mind boggling better than the 80.

Kevin
Title: Re: Jonsered 801
Post by: HolmenTree on December 29, 2016, 10:37:57 pm
When I bought my 910E in late 1979 after running the older Jonsereds 621, 80,801, 90 for 6 years ....the 910 was a beast for me with a 18"-20" b/c in flat ground cut and skid tree length production in conifer.
No more points, better throttle response and WOT for limbing/topping and very light for a 87cc saw. Only my 1986 Stihl 064 was a better power to weight logging saw.
Title: Re: Jonsered 801
Post by: Cjohnston77 on November 28, 2018, 02:51:03 pm
Does anyone know the base carb settings for the 801
Title: Re: Jonsered 801
Post by: ray benson on November 28, 2018, 03:20:13 pm
Out of a Clymer service manual
Tillotson diaphragm carburetor.
Initial carburetor adjustment is one
turn open from a lightly seated position
for both low and high speed mixture
screws. Make final adjustment with
engine warm and running. Adjust idle
speed screw so engine idles just below
speed mixture screw so engine will accelerate
cleanly without hesitation. Adjust
high speed mixture screw to obtain
optimum performance under cutting
load.

Title: Re: Jonsered 801
Post by: HolmenTree on November 29, 2018, 07:10:18 am
Does anyone know the base carb settings for the 801
From my 1970's memory running those Tilly HS Jonsereds "base" setting that they ran  best at was 1 1/4 turn out L and 3/4 turn out H