![]() ![]() While i was in the shop they did the same thing then they remaved a big slotted bolt at the front of the engine and air came out!! he then told me that the water tubes that go round the engine are blocked and will need to be cleaned out!! ![]() So i took the bottom leg off again and blew through the water tube (i put a piece of fuel pipe on the end of it) and found that air was exiting somewhere in the leg rather that through the 'pee' hole, so i rang a marine shop to see what this could be.Īfter speaking with their mechanic i took it in for them too look at it, I changed the impellor as i knew it would need one as very little water came out the 'pee' hole, but when i put it back together and ran the engine it pumped a good amount of water for about 5 minutes and then stop. 2 stroke fuel oil mix chart In this guide we step through the why it's vital to get the right 2 stroke fuel oil mix and some methods to work out which ratio to use for your outboard.Ģ Stroke Outboard Fuel Mix Ratio 50:1 100:1? Finding the right mix for your outboard.I have the same engine and had a similar problem with the water pump and the engine not pumping water as good as it should, so this is what i did. #Suzuki dt4 fuel mixture how to#įinishing with tips on how to mix two stroke efficiently and safely. Why mix Fuel & Oil anyway?Īny outboard described as a 'two stroke' engine is an internal combustion engine than burins injected fuel through a reduced power cyle of just ignition and exaust (more info about the difference between two stroke and four stroke engines here. ![]() ) Due to this design it is necessary to provide the engine with lubrication (the oil) actually within the injected fuel (the petrol or gas). The relative proportions of these two components is called the ' fuel mix ratio'. Getting the mix rightĮvery engine will have it's own fuel mix ratio, often mandated by power, intended use and age of the outboard and manufacturers state this required mix ratio and any tolerance (if there is any!) in the owners documentation that came with the original purchase. Not knowing and running the right mix can cause a whold bunch of problems. Difficulty starting, performance degradation, increased wear & tear of internal components, excessive smoke from the exhaust to name a few. Knowing the right mix is simple enough if you're buying a new outboard or were lucky enough to get the original owners manuals when purchasing an secondhand outboard but often these get mislaid as engines passthrough various owners over the course of their lifetime of years or even decades! Most outboards will tolerate an incorrect mix on occassion but running the wrong fuel oil mix over for any prolonged period of time is likely cause reliability and performance issues at best and potentially irrepairable damage at worst. If you're in this buck and don't have the original owners manual then you'll need to determine the right mix prior to use. Search for clues on the outboard - Most reliable!Ī good proportion of outboard manufacturers will print/inscribe/stamp the right fuel mix ratio somewhere on the unit itself. This might be really obvious on the cowling like in the image below of a late 1980s Yamaha outboard or it can be a bit trickier to track down being on the underside of the cowling, embossed on the fuel filler cap (outside or inside) or stamped on the side of the fuel tank. These are the most common locations but if you don't find any reference in these common places look for a reference on any engine number, batch or quality controls stickers or plates. This Yamaha's fuel mix ratio is clearly marked on the cowling at 1:100 Method 2. If a robust search of the engine doesn't surface anything the next best method is to reference either the original manufacturers owners handbook/operators guide or a service and repair manual. ![]()
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