hammerhead 5410
ArboristSite Member
I'll start by saying what a site!! Been reading for a few months now and was lured into the whole muffler mod deal.
I'm am in no way a gearhead, so bear with me here. I am a carpenter, hunter, fisherman and OWB owner, who likes to cut and split wood in his free time. I cut about 10 to 12 cords a year.
So, that said, I been reading up on the muff mods, found a few for my model and settled on one that was done by a member here using 3/4"ish tube stock. Looked real tough (cool)!!
I bored a 7/8" hole in the top, bar side, and reamed it a bit oblong to accept a piece of tube with a 7/8 od and 5/8 id angled up and out. After a thorough cleaning, I reinstalled the muffler, prior to welding on the tube, and ran it. The difference was nite and day. Although I didn't touch any wood with it, I could hear the power. Once the tube was welded on, the sound wasn't the same, I assumed it due to the over sized 7/8" hole necked down to a true 5/8". So, I drilled a 5/16" hole in the deflector and down into the muffler. Deburred, recleaned, and reinstalled. Again ran the saw, without much change back to the sound of the original test run.
Question 1: Did the harmonics change due to installation of the tube or am I not opened up enough.
I got the H limiter cap out, but managed to crack it, I didn't bother with the L, as it runs good at idle at the present setting. I trimmed it and reinstalled it.
Question 2: Do I need to immediately replace this cap?
I cleaned the plug, warmed the motor, brought it up to WOT and back the H out til she began to garble, I say 3/8 to 7/16 of a turn and stopped there. I then went to the pile and took her to a 30" piece of ash. More power for sure, but I wonder if I am getting all the power?
Now for questions 3 and 4: I cut about a cord and a half and checked the plug 4 times during that span and cannot see much of any color on the plug, just as clean as I put it in, it seems. How long til I can see a sign on the plug that I am running rich, right or lean?
At WOT in the wood she would cut out periodically, not die, just miss. This is not something the saw did prior to the mod. This saw has only 30 or so cords under its belt. What could this be?
And finally, I am in the market for a new chain and am all about speed, what do you all suggest. I am currently running safety chain same as that came stock.
Thanks guys!!
Mike
I'm am in no way a gearhead, so bear with me here. I am a carpenter, hunter, fisherman and OWB owner, who likes to cut and split wood in his free time. I cut about 10 to 12 cords a year.
So, that said, I been reading up on the muff mods, found a few for my model and settled on one that was done by a member here using 3/4"ish tube stock. Looked real tough (cool)!!
I bored a 7/8" hole in the top, bar side, and reamed it a bit oblong to accept a piece of tube with a 7/8 od and 5/8 id angled up and out. After a thorough cleaning, I reinstalled the muffler, prior to welding on the tube, and ran it. The difference was nite and day. Although I didn't touch any wood with it, I could hear the power. Once the tube was welded on, the sound wasn't the same, I assumed it due to the over sized 7/8" hole necked down to a true 5/8". So, I drilled a 5/16" hole in the deflector and down into the muffler. Deburred, recleaned, and reinstalled. Again ran the saw, without much change back to the sound of the original test run.
Question 1: Did the harmonics change due to installation of the tube or am I not opened up enough.
I got the H limiter cap out, but managed to crack it, I didn't bother with the L, as it runs good at idle at the present setting. I trimmed it and reinstalled it.
Question 2: Do I need to immediately replace this cap?
I cleaned the plug, warmed the motor, brought it up to WOT and back the H out til she began to garble, I say 3/8 to 7/16 of a turn and stopped there. I then went to the pile and took her to a 30" piece of ash. More power for sure, but I wonder if I am getting all the power?
Now for questions 3 and 4: I cut about a cord and a half and checked the plug 4 times during that span and cannot see much of any color on the plug, just as clean as I put it in, it seems. How long til I can see a sign on the plug that I am running rich, right or lean?
At WOT in the wood she would cut out periodically, not die, just miss. This is not something the saw did prior to the mod. This saw has only 30 or so cords under its belt. What could this be?
And finally, I am in the market for a new chain and am all about speed, what do you all suggest. I am currently running safety chain same as that came stock.
Thanks guys!!
Mike
Last edited: