Makita EA7900PRZ not the 7900 Dolmar of old

[Mulelogger]

Hello, this is my first post so please be patient. I searched threads but did not find . So here goes. I purchased a new Makita 7900PRZ 3 mths ago. My usual saws are Stihl 460's. I had 7900 Dolmar 11 yrs ago and wanted another but this new Makita is a LAME excuse. The anti-vibe is nice but this saw is a power and rev castrated version of a 7900 Dolmar of old. I feel I wasted $800 this saw will never run a bar above a 28 with authority in hardwood and it can't oil/lube a 24 turned wide open without leaving the bar hot and chains brown. Been to the dealer he said it is what it is. Any comments for a solution welcome. Thank You.

 

[stihl livin]

@166

 

[P.M.P.]

Got to wonder what the PRZ Stand for

 

[166]

Couple questions

Does this saw have the stock air filter or the HD filter?

Did the dealer tune the carb?

No changes to the oiler from the older models.

 

[166]

Got to wonder what the PRZ Stand for

P - Pro
R - Warm Red
Z - no bar and chain in the box
That's just a code for ordering different bar options

 

[Mulelogger]

Answer HD hump back filter , Yes was dealer tuned and now I have a super secret screwdriver and a tach. I even tried running winter bar oil to try and improve the oiling in semi cool temps 30's-40's.

 

[166]

Answer HD hump back filter , Yes was dealer tuned and now I have a super secret screwdriver and a tach. I even tried running winter bar oil to try and improve the oiling in semi cool temps 30's-40's.

The HD filter is the problem. What rpm will it tach out to. 12k?

Have the dealer install the standard air filter retune and you'll have more power.

 

[Mulelogger]

Thanks I did ask about the air flow being restricted and yes ,12100 is the best it will do. He advised a smaller exhaust port in the cylinder with a scavenged exhaust muffler and limited coil are power robbing this model. He suggested a Husky 390.

 

[huskyboy]

Thanks I did ask about the air flow being restricted and yes ,12100 is the best it will do. He advised a smaller exhaust port in the cylinder with a scavenged exhaust muffler and limited coil are power robbing this model. He suggested a Husky 390.

The hd filter setup is what kills the power on those saws. Try the low filter. My stock 7301 with low filter I tune at or a little past the limiter. It is ahead of a stock 572 or 462.

 

[166]

Thanks I did ask about the air flow being restricted and yes ,12100 is the best it will do. He advised a smaller exhaust port in the cylinder with a scavenged exhaust muffler and limited coil are power robbing this model. He suggested a Husky 390.

The only thing robbing power is that air filter. Does not work well with that cylinder/exhaust package. Most everybody likes the new generation saw better than the old generation.

I know your dealers rep and the inside tech/warranty guys and they will cover the changeover.

 

[166]

The hd filter setup is what kills the power on those saws. Try the low filter. My stock 7301 with low filter I tune at or a little past the limiter. It steps all over a stock 572 or 462.

I was just gonna ask you how your heated handle EA7301PR is running. Still completely stock right?

 

[huskyboy]

I was just gonna ask you how your heated handle EA7301PR is running. Still completely stock right?

Yessir still stock, I wore out two bars with it so far.

 

[P.M.P.]

I used to have a HD filter on my 7900 sold it... Like the regular better been running the mesh lately.

 

[Mulelogger]

Thanks for the excellent information will ditch the HD filter system.

 

[166]

 

[huskihl]

There are ways of fixing that small exhaust port and restricted muffler

 

[Woodpecker]

There are ways of fixing that small exhaust port and restricted muffler

Pulling the stupid crack pipe out of the muffler is a start.

OP if you don't feel like splitting the muffler the dealer I bought my saw from wont let one out of the shop without popping a couple holes in that sucker.

 

[huskihl]

View attachment 225288
Pulling the stupid crack pipe out of the muffler is a start.

OP if you don't feel like splitting the muffler the dealer I bought my saw from wont let one out of the shop without popping a couple holes in that sucker.
View attachment 225289

Yah. Good start fer sher

 

[porsche965]

Woodpecker, did the sound change much with those two holes punched in the crackpipe?

 

[Woodpecker]

Woodpecker, did the sound change much with those two holes punched in the crackpipe?

Not sure, never heard it without the holes. The dealer made it that way before I bought it. It changed when I gutted the muffler and added a second port.

Saw noise isn't something I worry much about. I always wear ear pro when I'm running one anyway. To me the lower operating temp and added power are worth a little extra noise.