Noisy 288xp

[reed1517]

I rebuilt a 1988 288 recently. Split the case, new bearings, hyway cylinder and piston. Base gasket delete. It runs and feels strong but man it is a noisy motor. Doesn’t purr like other bigger saws. Not sure where to start looking if there’s anything wrong at all. Not fully tuned in video.

 

[Squareground3691]

Whenever I do rebuilds always try to use OEM if you can especially bearings , just a good habit knowing what ur getting .

 

[reed1517]

View attachment IMG_1153.MOV
View attachment IMG_1153.MOV

Whenever I do rebuilds always try to use OEM if you can especially bearings , just a good habit knowing what ur getting .

You think it could be bearings?

 

[Squareground3691]

View attachment 1007249
View attachment 1007249

You think it could be bearings?

Hard to say , was it smooth when crank was installed after bearings, no binding center crank after install? check ur ring gap and vac , pressure check the usual stuff ?

 

[reed1517]

Hard to say , was it smooth when crank was installed after bearings, no binding center crank after install? check ur ring gap and vac , pressure check the usual stuff ?

It was very smooth. Passed all routine checks. Maybe I’m just being paranoid. Thank you for your time.

 

[Squareground3691]

It was very smooth. Passed all routine checks. Maybe I’m just being paranoid. Thank you for your time.

Yup , just run it break it in and see how it goes .

 

[serdie]

I just went thru my chinkanese 288 and used probably the same good parts that you did and mine sounds exactly like yours at idle. New bearings and seals (oem) same top end parts except a highway domed piston. Don’t use the highway wrist pin or bearing!! Not to speck. I’ve put about a months hard work on it and it’s ok so far just rattly at idle

 

[J D]

I haven't listened to the videos for fear of waking she who sleeps next to me, but... I once had a 350 that I rebuilt with an aftermarket piston I was given & the piston had enough clearance for the rod to travel side to side by about 1.5mm... ran fine but had a distinct rattle at idle rpm. Rod was moving sideways enough to contact the counter weights

 

[reed1517]

Thanks for the info guys. I did swap out the piston and reassembled. I’ll fire it up today to see if it improved the issue.

 

[reed1517]

New piston in. Big difference. I’ll lower the idle a bit and start breaking it in.
View attachment IMG_1159.MOV

 

[serdie]

New piston in. Big difference. I’ll lower the idle a bit and start breaking it in.
View attachment 1007505

I wasn’t so lucky, my noise is the big end rod bearing rattle at idle. I ordered an oem crank

 

[reed1517]

I wasn’t so lucky, my noise is the big end rod bearing rattle at idle. I ordered an oem crank

That sucks man. Good luck.

 

[J D]

New piston in. Big difference. I’ll lower the idle a bit and start breaking it in.
View attachment 1007505

Were the gudgeon bosses wider than the rod? Original video sounds very similar to what my 350 did

 

[reed1517]

Were the gudgeon bosses wider than the rod? Original video sounds very similar to what my 350 did

The piston was drilled off center. Went cheap and got a pop up from lil red barn. Just learning the hard way to use OEM whenever possible. Put the hyway piston back in the hyway cylinder. Hyway decent but not OEM.

 

[reed1517]

Update on the 288. Got it running strong. Caught my son cutting in our test log. Only partial video of the cut since I made him put PPE on. Old ash log/crotch about 30” across. Have it set really rich for now.
View attachment IMG_1186.MOV