Some Briggs & Stratton engines have an oil dipstick tube assembly. The assembly is intended for easier access to check the oil level or add oil to the crankcase. The dipstick and cap are sealed to the filler tube using an o-ring. The tube also is sealed to a hole in the crankcase with an o-ring or oil seal bushing. If the assembly is damaged, or the o-rings or oil seal bushing leaks, the parts must be replaced. Leaks from these parts consume more oil and burns if the engine is running without adequate oil in the crankcase.
- Skill level:
Things you need
- Oil drain pan
- Set of wrenches
- New oil dipstick assembly
- New oil dipstick o-rings
- New oil dipstick oil seal bushing
- Engine oil
Drain the engine's oil into an oil drain pan. Remove the oil drain plug on the engine with a wrench. The plug is found either at the bottom of the oil dipstick tube or on the bottom of the engine. Reinstall the plug after the oil is drained.
If hardware clamping the oil dipstick tube assembly to the engine can't be accessed because of the engine shroud, the engine shroud must be removed. Older Briggs & Stratton model engines had a metal shroud for access to the oil dipstick tube's hardware. Newer models will have plastic shrouds to remove. Remove all screws holding the shroud to the top of the engine.
Remove the oil dipstick tube assembly hardware with a wrench. This hardware clamps the oil dipstick tube assembly to the engine.
Pull the assembly out of the crankcase.
Replace the o-rings and oil seal bushing.
Push the assembly back into the crankcase.
Attach the assembly to the engine with the mounting hardware.
Reinstall the engine shroud.
Remove the dipstick from the tube and add oil.
Tighten the dipstick back onto the filler tube.
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