N00b changing carbs, ran into an issue...loose hoses??

[alphadog808]

Hey guys,
I was working on replacing the lower carb on a Yamaha 1990 130HP(130ETXD) and while the replacement of the carb went fine, I noticed a couple of worrysome things while I was in there.

When I took off the silencer, I noticed there were 2 thin hoses. I can clearly see that the top one connects to the oil reservoir. However, I have no clue where the bottom hose connects. A manual I'm looking at calls it the, "fuel recirculating hose"...strange name as it seems to be tied more to the oil side rather than the fuel side.

So..I searched the engine and found a connector(I think) with no mate low in the engine block. Below the lower carb(farther away from the transom). However, while investigating, I also found *another* connector(I think) with no mate between the top and lower carb(more forward towards the transom). In the latter case, there is a connector and hose right next to it, and it looks like it would fit and reach. The hose is about 3 or 4" long and if I were to connect it, it would just be a big "U".

As it stands, it would *seem* that the, "fuel recirculating hose" would go to the lower connector and the other connector should mate with the connector and hose next to it as the hoses/connections wouldn't reach if connected opposite....BUT, as I mentioned in the title, this is all new to me, so I want to make sure that's right. In fact, I'm not 100% sure those things I found are connectors...but they sure look like it.

I couldn't get a good pic of the connector below the lower carb, but I have attached a pic of the connector next to the other connector with hose. Note, the hoses don't seem to go on tight and I don't see any clamps or clamp marks on the hoses.



Thank you so much in advance!!

 

[Capt Ken]

Re: N00b changing carbs, ran into an issue...loose hoses??

The top hose is the oil tank overflow hose and only comes into play if the float malfunctions and the tank overfills. The bottom hose sucks any fuel that may drip into the front cover. It connects to a nipple below the lower carb in the intake. Do not mess with any of the bleeder hoses/ recirculating lines. Also get rid of the hose clamps. They are a big no no on outboards. Use only black UV resistant wire ties. Hoses should be snug enough that they will not leak and the strap only prevents the hose from sliding off past the bulge on the nipple. Hose clamps on that small of hose will cause leaks and also cuts the hose.

 

[alphadog808]

Re: N00b changing carbs, ran into an issue...loose hoses??

Thanks so much for the insight, Capt Ken!

Any idea about that short hose(about 3-4") that's located between the top and lower carb? It seems logical that it should connect to that nipple right next to it, but I wasn't sure. In the pic above, you can see the exposed nipple(I think!) and the short hose to side and a bit above it. You can't see the end of the short hose in the pic as it was hard to get in there with a camera. When I tried putting it on to see if it would fit, it seems like a pretty loose fit, hence why I thought it might need a clamp/tie/etc.

Are the connections to those nipples supposed to be that loose? I didn't see any pressure marks on the outside or inside of the hose where something should connect...

 

[alphadog808]

Re: N00b changing carbs, ran into an issue...loose hoses??

Just an update with pics to help explain my problem as it's kinda hard to explain without more pics...