Everything to use, troubleshoot and repair your petrol brushcutter McCulloch B33B: its official documentation to view, compatible spare parts, video repair tutorials, and answers to common questions about this model.
| Type de moteur | Essence 2 temps, monocylindre refroidi par air |
|---|---|
| Cylindrée | 33 cm³ |
| Puissance | 0.9 kW |
| Régime à vide | 2700–3000 tr/min |
| Réservoir carburant | 0.7 L |
| Bougie | Champion RCJ6Y |
The most common problems, and the best answer we have for each. Every answer states how closely it applies to your appliance.
Answers taken from tutorials published by repair specialists. They cover this family of appliances, not this exact model — but the parts they name are the ones the manufacturer declared for it.
Tutorials published by spare-part specialists. Unless stated otherwise, they show the operation on an appliance of the same family — not on your exact model.
Filmed on another model: locations and fixings may differ.
SparekaFilmed on another model: locations and fixings may differ.
SparekaFilmed on another model: locations and fixings may differ.
SparekaFilmed on another model: locations and fixings may differ.
SparekaFilmed on another model: locations and fixings may differ.
SparekaFilmed on another model: locations and fixings may differ.
SparekaDescribe your problem, get an answer for your model, and say whether the solution worked.
No questions yet
Having trouble with this model? Ask the community.
The regular habits that prevent breakdowns and extend your appliance’s life. Each tip shows how often to do it; those marked “For this model” are specific to your appliance, the rest apply to the whole family.
Two-stroke mix goes stale and separates within weeks: past a month it starts poorly, fouls the engine and makes it run hot. Mix small batches, keep to the ratio in the manual, and drain the tank before long storage.
Cutting dust clogs the filter fast. A clogged filter means higher fuel use, lost power and hard starting. Pop the cover off without tools, tap it out or wash it in soapy water, and dry it fully before refitting.
Grass and soil build up around the cylinder and stop air from cooling the engine — the number-one cause of overheating. After each session, blow or brush out the engine housing and the air intake grilles.
A dull blade strains the engine and kicks back dangerously on woody stems; a cracked blade must be replaced, never reused. Before each use, check the edge, look for cracks, and make sure the blade nut is tight.
At the start of the season, pull the plug: black, wet electrodes point to a rich mix or a dirty filter. Clean the deposits, set the gap per the manual, and replace it if the insulator is cracked.
Before winter, run the engine until it uses up the fuel in the carburettor (stagnant two-stroke gums up the diaphragms). Clean the machine, grease the cutting head, and store it dry and away from frost.
Updated 21 July 2026
Parts listed for this product. Their availability for sale is not verified: each link runs a search at retailers.
Keep&Repair does not sell any part. The listings below link out to third-party sellers.
Some listings are sponsored. Prices are indicative and set by the supplier — check the seller before buying.
Entry points declared by the manufacturer in public data. These are not documents: they lead to a site where you still have to look up this model to find a part or get support.
External site — you still have to search for the model there.
No owner feedback yet
Do you use this product? Your experience can help others make it last.
Be the first owner to share your experience