PS-7900 vs PS-7910

[SawTroll]

I thought I'd read on here quite a while ago (and I thought you might have mentioned it) that's how some of the manufacturers presented their 'weights' in the past ?

All I remember about that is that someone claimed that Husky did it, but that wasn't true. They have made at least one mistake with not adjusting the specs when beefing up crankcases though, and no brand I know of has a perfect record regarding weight specs.....:msp_sneaky:

 

[SawTroll]

Where's that blasted DISLIKE button!!???

I would have got a lot of those I guess, if that button existed!

 

[166]

So the 7900 specs were without the clutch cover - that's quite disturbing.......:msp_confused:

I explained the weight of these saws back in a thread from 2004. But that was before you were here but we had glens to pick apart the specs on the 7900 back then.

http://www.arboristsite.com/chainsaw/15667-5.htm

 

[166]

[video=youtube_share;TMK0jE4X9rE]http://youtu.be/TMK0jE4X9rE[/video]

 

[benp]

[video=youtube_share;TMK0jE4X9rE]http://youtu.be/TMK0jE4X9rE[/video]

That'll do. :msp_thumbup:

Quite the sassy tone on that. I like it.

 

[166]

That'll do. :msp_thumbup:

Quite the sassy tone on that. I like it.

It's quite a bit louder and has a different sound than a 7900. This saw came back from a demo today and they bought a pair of the 7910's.

 

[FATGUY]

silly question but are there new HD filter setups that match the new matte finish covers?

 

[Hedgerow]

It's quite a bit louder and has a different sound than a 7900. This saw came back from a demo today and they bought a pair of the 7910's.

What about the big saw offering???
Replacement for the 9010???

 

[Andyshine77]

What about the big saw offering???
Replacement for the 9010???

Hum, I wonder why they beefed up the bottom end on them new 7910's?:msp_smile:

 

[tdi-rick]

What about the big saw offering???
Replacement for the 9010???

Hum, I wonder why they beefed up the bottom end on them new 7910's?:msp_smile:

55mm bore with the current stroke will give 88cc, 56mm bore = 91cc..........

 

[SawTroll]

I explained the weight of these saws back in a thread from 2004. But that was before you were here but we had glens to pick apart the specs on the 7900 back then.

http://www.arboristsite.com/chainsaw/15667-5.htm

Yep, I remember glens wery well, and I did read on here back then! :msp_wink:


.....btw, looks like glens corrected your statement about the clutch cover back then, and the 7900 didn't weight as much as 14.8 lbs then, more like 14.4. Did the 7900 you weighted for this thread have a HD filter kit on it?

Regardess of this, the 7900 still is an interesting model, and I have surely would have had one, if I had any use for it! :msp_wink:

 

[Hedgerow]

Hum, I wonder why they beefed up the bottom end on them new 7910's?:msp_smile:

You and Rick may be on to something... But I hope it's a well thought out offering akin to the 6400/7900 jug upgrade... Not the 7900 / big bore downgrade...

 

[tdi-rick]

You and Rick may be on to something... But I hope it's a well thought out offering akin to the 6400/7900 jug upgrade... Not the 7900 / big bore downgrade...

If that's what is happening, you would think with the factory doing it, it will be right.

All that appeared to happen with the 54mm bore kits is that the aftermarket manufacturers took a pattern of a 52mm Mahle jug and punched it out to the bigger bore, restricting transfer volume/size at the same time.

 

[benp]

Hum, I wonder why they beefed up the bottom end on them new 7910's?:msp_smile:

55mm bore with the current stroke will give 88cc, 56mm bore = 91cc..........

You and Rick may be on to something... But I hope it's a well thought out offering akin to the 6400/7900 jug upgrade... Not the 7900 / big bore downgrade...

If that's what is happening, you would think with the factory doing it, it will be right.

All that appeared to happen with the 54mm bore kits is that the aftermarket manufacturers took a pattern of a 52mm Mahle jug and punched it out to the bigger bore, restricting transfer volume/size at the same time.

Forgive my ignorance, but are you guys saying that the bottom end on the 7910 is overbuilt for it's current application?

If so I have seen this before...in snowmobiles.

When Arctic Cat came out with it's ZR800 twin, the bottom end was bullet proof. It didn't make sense that that kind of upgrade would be made for that motor unless........something bigger was coming down the line.

Sure enough, a little later, the ZR900 emerged on the same bottom end. Aaaaand that same bottom end was used for some ridiculous big bore motors.

Anyways, I digress, very intredasting though. Would be fun to have a 90cc saw in the size of the 64/73/79xx series saw.

 

[tdi-rick]

Forgive my ignorance, but are you guys saying that the bottom end on the 7910 is overbuilt for it's current application?

If so I have seen this before...in snowmobiles.

When Arctic Cat came out with it's ZR800 twin, the bottom end was bullet proof. It didn't make sense that that kind of upgrade would be made for that motor unless........something bigger was coming down the line.

Sure enough, a little later, the ZR900 emerged on the same bottom end. Aaaaand that same bottom end was used for some ridiculous big bore motors.

Anyways, I digress, very intredasting though. Would be fun to have a 90cc saw in the size of the 64/73/79xx series saw.

Ben, the Dolmar dealers on here have been saying that a new 90+cc saw is coming to replace the PS9010, so we are just indulging in a little speculation

 

[benp]

Ben, the Dolmar dealers on here have been saying that a new 90+cc saw is coming to replace the PS9010, so we are just indulging in a little speculation

LOL - I just giggled like a school girl when I read that.

That would be really really cool.

I better start saving now, everyone needs a backup 90+, especially if Dolmar is able to successfully pull it off in that chassis.

 

[SawTroll]

You and Rick may be on to something... But I hope it's a well thought out offering akin to the 6400/7900 jug upgrade... Not the 7900 / big bore downgrade...

I (really my brother) agree that the 84cc BB kits are a major downgrade on the 7900, unless they are extensively modded - and they can't be ported anywhere close to ideal anyway, too little material in important places. Stock (OEM) 7900 is much better, but still has some limitations, regarding porting.

 

[Hedgerow]

LOL - I just giggled like a school girl when I read that.

That would be really really cool.

I better start saving now, everyone needs a backup 90+, especially if Dolmar is able to successfully pull it off in that chassis.

I may make it up to Specter's gtg in northern WI this August... I got a dandy 9010 for ya to run... Built like a tank and power to spare... VERY sexy saw...:msp_sneaky:

 

[angelo c]

Who said it's too small Nik ?

ummm errrr ummmm don't do it...don't say it....


My self control classes are working so well lately.....i was so close but managed to not say it...

 

[Andyshine77]

Who said it's too small Nik ?

I think Nik misspoke when he said too small, he meant the case is smaller than most saws of that size. I personally haven't measured the case volume of the Dolmar, I'm just going by what others that I trust have said.