The power head has been pressure and vacuum tested so it doesnt leak when brought to operating temperature. The muffler has also been ported for flow. I couldn't be happier with the gains I made, especially for my first real porting job. The cylinder has been port mapped, ported, smoothed and chamfered to make sure the piston will not snag a ring. I have since backed it off to about 13.8-14k for regular work. After the vid I was able to tune it up to 14.4k no load and still had a little bit of 4-stroking. In the video posted below, I was still tuning up and at that point it was spooling about 13.6k no load. widened exhaust port to 70% of bore diameter and enlarged entire exhaust outlet, matching the heat shield and muffler to it squared up intake, left timing where the base gasket delete brought it lower transfer blending/beveling/case matching and removing the large humps in the exhaust side transfers I think I had the top end off about 6 times from start to finish. From the first simple base gasket delete mod to the final mod to porting making the saw the way it is now, I went in several stages. I did it myself using Randy's XPW build thread over on AS as my guide. I am very pleased with the way my ported XPW came out. But if it's in good shape, it's not worth the expense of a new cylinder for the small gain in power. Gonna be hard for me to pass this up but was hoping for some advice from you guys on making my choice. Following prices on just a few of the items: 562XP 20' for 599 ( I presume Auto-tune) 372XP 20' for 703. If it's toast, then replace it with the larger cylinder. Local dealer having a one day Husqvarna 20 off fleet sale in about a week. Guys who pull a perfectly good 48mm closed port cylinder off a 365/2165 in favor of the 50mm unit are wasting a very good cylinder! Those saws can easily be made to out cut stock 372's with just a little "lovin". Personal opinion: The 48mm closed port cylinder is very underrated. There is a service bulletin that lists the change to the Walbro carb as taking place in week 26 of 2000. But it's safe to conclude only the 1996 and some 1997 365/2065's arrived here with the open port top ends. Again, I think continued use of the open port piece in other markets is likely the reason for this. There are no service bulletins that list a serial number brake for when the change to the closed port jug took place. Only the closed port cylinder, #503939005 is currently available. Part numbers with "939" in the middle are the closed port cylinders. Part numbers with "691" as the middle 3 digits are the open port jug. IPL's for many years listed the part numbers for both cylinders. Much confusion arises from the fact that the open port cylinder was still used on saws in other markets well after we received the closed port style. The closed port 372 style cylinder was listed in IPL's as the "EPA" cylinder. First year IPL's are the only ones which only list the open port cylinder. The open port 365/2065 jug was only used the first year or so here in the US. Nikasil Plated Cylinder Piston Bearing Kit For Husqvarna 51 55 For Rancher (46mm) Chainsaw Fuel Filter Line Gasket 503 16 91-71. That was just a marketing term that came and went on several models, but does not necessarily denote changes with whatever model. P SeekPro Cylinder Piston Kit 50mm for Husqvarna Chainsaw 365 X-TORQ 372 X-TORQ 372XP XPX-TORQ PN 575255702 575774102 575774101 575255701. Ill swap its race ported cylinder with 084 carb for a 1995 066 P/C. (Read 51878 times) 0 Members and 1 Guest are viewing this topic. The AM kit circlips also recently caused some turmoil in form of ears braking off and seizing the P&C.The "special" decals are no help when sorting out which cylinder was used on the 365. Author Topic: Husqvarna 372xp Original Edition vs. It is recommended to replace the AM kit piston ring with an OEM or Caber one. Fit For Husqvarna 362 365 371 372 372XP 375K Chainsaw, Diameter: 52mm Note: This cylinder will not fit X-Torq models. If cost is a issue then a AM P&C kit is acceptable, but it should be looked at and reworked thoroughly before assembly and squish must be checked too. The AM P&C kits, regular 52mm and 54mm BB, are said to lack proper factory pre-set squish and feature low manufacturing quality (low cast quality, bad port beveling, questionable plating - these issues relate to cylinders and may not be evident on all AM kits).Īlso the 54mm BB kit is said to sport more grunt but not truly noticeably more power then the OEM 79cc P&C - it has supposedly something to do with insufficient crankcase volume to properly feed the 54mm cylinder. The original PS-7900 kits are NLA, but PS-7910 P&C conversion kits are available - they are direct bolt on. For the Dolmar 64xx/73xx/79xx saw family a OEM 79cc P&C kit is deemed top shelf!
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