36cc baja 5B oil swap

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
port timing will be effected some, but not enough you'll notice anything on a stock engine. If anything the gained torque will make it run better. Ignition timing isn't something you'll need to worry about much either. .065" is a lot, but i don't think it's going to get you anywhere close to the compression numbers you need. I'm really thinking either they sent you the wrong parts or were missing something.
 
Seandonato73 said:
port timing will be effected some, but not enough you'll notice anything on a stock engine. If anything the gained torque will make it run better. Ignition timing isn't something you'll need to worry about much either. .065" is a lot, but i don't think it's going to get you anywhere close to the compression numbers you need. I'm really thinking either they sent you the wrong parts or were missing something
Click to expand...
OK so i pulled the carb and pipe off.....blocked the exhaust port and the intake (only removed carb) will not pull a vacuum.... If I used a regulator how much pressure could i apply before crank seals leak?
 
Last edited:
If you put painters tape on the exhaust and intake port you'll see them swell and suck in on as you rotate the engine. Either bad base gasket, crank case casket or seals.

Proper thing to do is put like 5psi of pressure in and submerge the engine and watch for bubbles. Ive never heard applying a vacuum.
 
Rep732 said:
If you put painters tape on the exhaust and intake port you'll see them swell and suck in on as you rotate the engine. Either bad base gasket, crank case casket or seals.

Proper thing to do is put like 5psi of pressure in and submerge the engine and watch for bubbles. Ive never heard applying a vacuum.
Click to expand...

Rep732 said:
If you put painters tape on the exhaust and intake port you'll see them swell and suck in on as you rotate the engine. Either bad base gasket, crank case casket or seals.

Proper thing to do is put like 5psi of pressure in and submerge the engine and watch for bubbles. Ive never heard applying a vacuum.
Click to expand...
Almost ready
 

Attachments

  • 20230525_215124.webp
    20230525_215124.webp
    57.9 KB · Views: 4
Vac and pressure test is std for checking for leaks in a 2 stroke. The case sees both, and the seals can leak vacuum and pressure, well the entire engine can leak under both conditions, but mostly the crank seals are a concern for vacuum. I don't reccomend going above 7psi, 5 should tell you just fine where you stand. I used to go 10psi, but had a trimmer engine push one of the seals out of its bore... long story on that but I've backed it off since then.
 
Headed to do it now stay tuned
Sorry guys got side tracked

the result is a crank seal on the clutch side... ive changed seals before by drilling a small hole in the seal the inserting a screw and pulling out with pliers.. anyone have an idea with cracking the case apart.
 
Last edited:
I have a sound shaped pic tool I'm thinking of trying to grab it in the center where it seals on the crank...very flexible there.. try pulling or prying there...I guess i'll find out tonight after work..
 
Back
Top