Victory Parts stocks outboard carburettors, carb rebuild kits and individual carburettor parts for 2-stroke and 4-stroke Yamaha, Mercury, Suzuki, Tohatsu, Honda and Evinrude motors. Most outboard running problems, hard starting, rough idle, hesitation and that frustrating cut-out at trolling speed, trace straight back to a dirty or worn carburettor. Whether you need a complete replacement carby, a two stroke engine carburettor, or just a rebuild kit with the gaskets, needles and jets to bring your existing unit back to life, you will find it below, all in stock in Australia with same-day dispatch on orders placed before 2pm.
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The carburettor is the part that mixes air and fuel in the right ratio and feeds it to the cylinders. On a carburetted outboard there is no computer trimming the mixture for you. The jets, needle and seat, float and passages inside the carby do it mechanically, and they only work properly when every one of those passages is clean and every gasket seals. A 2-stroke outboard often runs a carburettor per cylinder, so a twin or triple can have two or three carbs that all need to be in tune together.
Because the tolerances inside a carburettor are tiny, it is the most fault-prone part of the fuel system. A jet the width of a pin can block with a speck of varnish and turn a smooth-running motor into one that stalls, hesitates and refuses to idle. The good news is that a carby is also one of the cheapest parts to service, and a rebuild kit costs a fraction of the powerhead it protects.
Most carburettor faults show up as one of a handful of symptoms. Hard starting, especially after the boat has sat for a few weeks, usually means fuel has gone off and gummed the jets. A rough idle or stalling at trolling speed points to a blocked idle circuit or pilot jet. Hesitation, bogging or a flat spot when you open the throttle is a sign the main jet or accelerator circuit is starved or dirty. Flooding, fuel weeping from the carby, or a strong fuel smell often means a stuck float or a worn needle and seat letting too much fuel through.
The common thread is fuel. Old, dirty or water-contaminated fuel is behind the vast majority of carburettor problems, which is why a clean fuel system upstream of the carby matters so much. Fit a quality boat fuel water separator and change your outboard fuel filters on schedule and you will prevent most carby faults before they start.
In Australia, standard unleaded is commonly sold as E10, which contains up to 10 per cent ethanol. Ethanol is hard on carburetted outboards for two reasons. It attracts and holds water, and once the fuel absorbs enough moisture the water and ethanol separate out and sink to the bottom of the tank, where it gets drawn into the carby first and causes corrosion and rough running. Ethanol also acts as a solvent that breaks down over time, leaving varnish and gum deposits that block the fine jets and passages.
Petrol with ethanol starts to oxidise within a couple of weeks of being pumped and can be gummy enough to clog jets within six. If your boat sits between trips, that is how carbs end up needing a clean. The defence is straightforward: avoid leaving ethanol fuel in the tank for long periods, use a marine fuel stabiliser in every tank, and run the carby dry before extended storage. When prevention fails, a rebuild kit puts it right.
For most carburettor problems, a rebuild kit is the right first move. If the carby body is sound and the trouble is gum, varnish or worn soft parts, a kit with new gaskets, O-rings, needle and seat, float spec and jets will return it to as-new performance for a fraction of the cost of a replacement. A thorough clean and a fresh kit fixes the large majority of faults.
Replace the whole carburettor when the body itself is damaged: corroded or pitted castings from long-term water contamination, stripped threads, a warped mating face that will not seal, or a throttle shaft worn so loose it draws air. If you have already cleaned and rebuilt a carby and it still will not run right, a corroded body is often the reason. We stock both complete replacement carburettors and rebuild kits so you can choose the fix that suits the condition of your unit.
Carburettors and their kits are matched to the exact engine. The first thing to get right is engine type. A 2-stroke carburettor and a 4-stroke carburettor are built differently and the parts do not interchange. From there the correct carby or kit is selected by engine make, model, year and horsepower, because jet sizing and float configuration change across the range. On multi-cylinder 2-strokes, remember you may need a kit for each carburettor on the engine.
Victory Parts stocks carburettors, rebuild kits and individual carby parts to suit Yamaha, Mercury, Suzuki, Tohatsu, Honda and Evinrude outboards. If you are not sure which part fits, send us the engine make, model, year and horsepower, and the number of cylinders, and we will match the correct carburettor or kit for you.
A carburettor rebuild is a patient bench job rather than a difficult one. Work clean, keep your parts in order, and allow an afternoon for a first attempt:
On a multi-carb 2-stroke, do each carburettor the same way and then synchronise them so they open together. If you are not confident with carby work, any marine mechanic can rebuild and tune a unit quickly, and our kits supply everything they will need.
A carburettor only stays clean if the fuel reaching it is clean, so service the rest of the fuel system at the same time. Fit or renew a boat fuel water separator to stop water reaching the carby, replace your outboard fuel filters while you are at it, and check the outboard fuel pumps and primer bulb for cracking or weak delivery. Reseal everything with fresh marine engine gaskets, and if the motor is due, top up with the correct outboard engine oil. Sorting the whole fuel system in one go is the surest way to keep the carby trouble-free through the season.
Size it against the requirement for the waters you boat in, then go up from there. Queensland, as an example, sets a minimum of 45 litres a minute for vessels from 5 to under 8 metres and 70 litres a minute at 8 metres and over. Because pump ratings are measured at open flow and real installations lose flow to hose and lift, choose a pump comfortably above the minimum rather than one that just meets it.
A standard pump only runs when you operate the switch at the helm. An automatic pump has switching built in and starts on its own as water rises, whether or not anyone is aboard. If the boat sits on a mooring or lives outside where rain collects, fit an automatic.
No. An automatic pump already has the switching built in. A separate float switch is for running a standard pump automatically, and some owners prefer it because the switch can be positioned independently of the pump and is cheaper to replace when it wears out.
No. It runs only when water reaches the switching level, then shuts off. A pump that cycles constantly is telling you water is getting in faster than it should, and the leak is what needs attention, not the pump.
Usually a blockage or an air lock rather than a dead pump. Check the strainer for debris, look for a kinked, collapsed or blocked discharge hose, and make sure the skin fitting outside is clear. If the pump is not running at all, check the fuse, the wiring connections and the float switch before replacing the pump.
On any boat with more than one enclosed compartment, yes, because water trapped in a sealed compartment cannot reach a pump somewhere else. Many owners also run a second pump mounted higher as a backup to the primary, so a failed pump or a jammed switch is not a single point of failure.
Match the hose to the pump’s outlet and use the corresponding plumbing kit, stocked in 20mm and 28mm. Fitting undersized hose or reducing the outlet chokes the flow, so the pump delivers less than its rating no matter how big it is.
Test it at the start of every season, after any long period of sitting, and periodically through the year. Tip water into the bilge, confirm an automatic pump starts on its own, clear the strainer and inspect the hose and wiring. It takes a few minutes and it is the only way to know the pump will work when you need it.
With years of experience in the marine parts industry, our knowledgeable team is here to guide you through our product offerings, ensuring you find exactly what you need.
