Gents

I recently gained a Mariner 3hp or 3.3hp outboard, could some one tell me the oil petrol mix.

Cheers Peter

Probably 50-1 but may be 100-1.it wil work fine on 50-1.

Jim

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The Fishermans Friend is the Flirty Fly,Fickle Food for Fleeting Fish.

Use 50:1 regardless if it says 100:1.

If you ever have the water pump fail, or pick up weed or plastic that blocks the water intake to make it overheat, you will do far less damage to your engine with extra oil in the fuel.

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Norm

Float Tube Fishing 30+ years
Float Tubing Info Resource

I am pretty sure it is 50 : 1 as well, and like the lads have said above, a little more oil is better than less. Check the plug for over oiling though, or if it becomes difficult to start.
Do remember to pull the rope lightly until you find resistence, this means that you are coming onto the compression stroke, allow the rope to recoil then pull it with a fairly short stroke. I have seen guys sweating buckets, pulling the engine out of the water even, when trying to start it. A 2ft pull on a 4ft rope is much better than trying to get a 6ft pull on a 4ft rope, something has to give and it is usually the rope or heaven forbid the recoil spring.
All the best with the engine,
Sam

Depends how old it is and how loose it is. Basically as above try it on 50. If it's smokey, sluggish when warm and generally a poor starter change to 100. Of course it will be smokey for the first 2-3 mins but once it's warmed up look again.

In my old job I had a dozen of them to look after and the majority behaved but some needed a certain mix to behave. They were all Yamahas but a lot of Mariners are re-badged Yams. You will find out soon enough . Make sure you have some spare prop pins-that may become a bigger issue!

Chris.

50 to 1 it is then gents

Thanks for the reply's

Peter

yeah 50 -1 ratio better to play on the safe side!

Outboard urban legend, I'm afraid.

If you block your intake or your water pump totally fails, all the oil in Saudi Arabia won't save you from Kentucky Fried Engine. Just like draining all the coolant out of your car, it won't matter what oil is in the sump.

The only cure for a failed water pump is not to let it happen in the first place. Also, watch the indicator stream if running in places where the intake might become blocked.

Grouse

But a 2-stroke has the oil mixed in the fuel, and some coolant goes everywhere the fuel goes. So more oil in the fuel= better cooling and lubrication all other things being equal. If the waterpump fails a 2-stroke always has oil present on the pistons to help soften the oncoming engine seize. The 2-stroke pistons are "wetter" and the 4-stroke pistons are "drier" a marginal difference when things go wrong. The repair bill will likely be lower for the two stroke.

Neglect is inviting trouble, but accidents happen. Crisp bags and the floating plastic in harbour areas are a danger to outboard users, because upon increasing throttle to leave the shore, one may become sucked onto the intake, reducing or blocking water intake for cooling and later it floats away unnoticed but the damage has been done to the waterpump, or worse, pump and engine.

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Norm

Float Tube Fishing 30+ years
Float Tubing Info Resource

You are confusing lubricant with coolant. Lubricant reduces friction, coolant removes heat.

Coolant does not "go wherever the fuel goes" because the coolant is water, not oil. As with any water-cooled engine, an outboard cools itself by circulating cold water in the water jacket surrounding the cylinder head and the water then transfers the heat away. Cut off that water supply and the engine will begin to overheat almost immediately. Run it for any period of time with the coolant intake cut off and you'll warp the cylinder head and do all kinds of other damage.

This myth of adding extra oil to "prevent" possible overheating has circulated over here for many years as well. 50:1 is more than enough to provide protection against friction, there is no way to prevent overheating other than to keep that water supply circulating.

Grouse