1998 115 X-Flow Rude-fuel situation

[R.Johnson]

Re: 1998 115 X-Flow Rude-fuel situation

Kenny: Have you tried a vacuam test on the system, along with a lenght of clear hose. That would show if you had a restriction, and how much. I can't visualize how you could have a siphon action from the oil tank, and get into the carbs. If the engine was setting with full carb bowls while at rest, the needle, and seats would stop further flow action. Try the clear hose tie strapped to a ruler, and see how much oil is drawn in while running.

 

[rodbolt]

Re: 1998 115 X-Flow Rude-fuel situation

hello<br /> I have never seen a system check tach with no lights. its either a standard tach with a system check gauge or a standard tach with a horn driver.if it does not have the system check tach with lights it has to have either a horn driver or a system check gauge. or its not rigged correctly. I just went and looked at my 98 115spl, no restriction alarm. yours may have it but I have never seen it on a crossflow of that year. the decal was a standard issue thing and may be there even on motors with no VRO or restriction sensor. if in doubt have a look. you can use a fuel system vacum gauge to find a restriction. start by teeing it in at the fuel pump intake. if fuel system vacum at the intake goes above 6"Hg move the tee back to the next connection and retest. keep going until you either find the restriction or are back at the tank. could be someone added the sensor,the sensor failed, the fuel is actually restricted or its an over heat but the slow funtion has been disconnected or is inoperative.its quick and easy to find fuel restrictions you can start at the pump or the tank. your option. could be a clogged draw tube screen. some tanks but the screen in the top of the draw tube. could be a bad or to strong anti-siphon valve. take a physical look for the restriction sensor. its easy to add and I have added many to all makes over the years. will take less than 20min to vacum test the system. if you suspect an errant piece of plastic in the tank drill a series of 1/8th inch holes about 1/4" above the bottom of the fuel draw tube in the od of the tube. the sensor is supposed to trigger at 6"Hg

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

Well, it's snowing like mad now....if it let's up I'll see what I can find.<br />I was wrong about the system check tach, it has a standard tach w/o lights as posted above.<br />Whats killing me, Rodbolt, (I know seahorse thinks I'm crazy)but it runs as it should beautifully on my portable tank....no alarms, perfect start, etc. When I remove my connection, install the boat tank line, and "IF" the bulb will pump up, within 5 minutes, I've got a steady alarm. It will quit if I put my fuel line/tank back on(Immediately), or get the boat tank's bulb to pump up. I don't have a temp stick, but I can hold my finger on all 4 cyls. while the alarm is going off...I don't feel any difference than when it isn't going off...<br />The overheat function is working...that's how he knew it was overheat last year because the engine would not go above about 2000RPM. Normally, the solid tone has been while running a higher RPM and all it takes is going back and getting the bulb to pump up again, and it stops (The tone) it may not do it again for 2 days.<br />The starting issue I believe, is the oil filling the carbs...it smokes BAD for 3-5minutes after start if you can keep it running.<br />I guess you guys think I'm nuts, but thanks for all the help! I'll check some of the suggested items.

 

[ob]

Re: 1998 115 X-Flow Rude-fuel situation

Sounds like you've already narrowed down the alarm problem by using your portable tank.This is if that particular engine has the fuel restriction constant alarm feature. Next step is to pinpoint the issue with the other one.Defective anti-syphon valve,vent problem,pickup tube restriction,fuel connector problem,defective primer bulb,etc...etc..<br /><br />As OBJ alluded to earlier in this post,the oil rich condition could be a failed seal between the fuel and oil chambers of the vro pump or even a syphoning thru issue from reservoir.Both of these are quite possible since the oil circuit stays primed at all times.Also the reservoir vent,at least on my 96' model is of questionable design and can be retrictive causing tank pressure buildup and oil to be syphoned or even forced through the oil hose to the vro inlet.I had this very exact issue(oil rich startup) with my vro some time ago and frankly got sick of dealing with oil rich mix on initial startup and bypassed mine.Still using the same pump ,just as a 50:1 pumper.To each his own.

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

If it was mine ob, the VRO would be gone too. It's what I done on my last one and the one I have now and I don't have these kind of issues.<br />There is something to be said for 50:1 in the tank, but in this case, if I'm starving for fuel...the oil would be less as well, so we'll continue on!

 

[rodbolt]

Re: 1998 115 X-Flow Rude-fuel situation

I am not saying your crazy . The restriction sensor is just a vacum switch teed in the line. they fail sometimes. thats why I say put the old vacum gauge on it by the pump intake. if the resriction alarm goes off at any thing below 6"Hg its bad. if the fuel system vacum goes over 4"Hg on that motor, ya gotta a restriction. I have added the restriction alarm to yams,mercs,tohatsus, jonnyrudes and about anything else that has a horn and a screened draw tube. I have installed the fuel line check valve from a v6 yam in the oil line on some vro/oms jonnyrudes. usually on pontoons and deck boats due to the oil siphon. checkwith a dealer I think there is a bulletin on it someplace.<br /> but if it runs well on the shop tank its between where ever your attaching the shop tank to the gas in the hull tank.

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

Thanks rodbolt...looks like snow all week, so it may be next week before I can get back on it.<br />I will check vacume and let you know...should be interesting.

 

[seahorse5]

Re: 1998 115 X-Flow Rude-fuel situation

Walleyehed,<br /><br />Since it has a regular tach in it, does it have the 2" System Check gauge with the 4 warning lites? If so, do any of the lites illuminate when the horn sounds?<br /><br />To try and alleviate the oil in the gas line situation, try to relocate the tank so it is not so high above the "VRO" pump. Also use a straitend out paper clip, use side-cutters to cut a 45 degree angle on the end, and insert that sharpened end into the center vent hole on the inside of the oil tank cap. You will feel the paperclip puncture the vacuum needle valve rubber tip. Now the tank will not build up internal pressure when the air gets warm, and it will keep the pressure form forcing oil past the VRO check valve.

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

I've done the paperclip trick, but I still think the tank needs to be relocated.<br />The tach and speedo are the big 2, then voltage, water pressure, trim and fuel are the only 2" gauges in the dash...no system check lites, no separate gauge either.<br />My system check was part of the tach-4 red lights along bottom, but this one doesn't have it...???....

 

[rodbolt]

Re: 1998 115 X-Flow Rude-fuel situation

walleyehed<br /> look for a rectangular box about 4 1/2 square under the helm area. if it does not have the system check tach or gauge it has to have a horn driver. if it does not crazy things can happen. I have had several boats that were rigged without any of them. one was a blown 50 2 cyl. the man bought it new on a back door deal and had a shade tree inland of me a bit install it. with no lights or horn driver he had no alarms. ran it hot till she died. had no recourse. the local dealer would not warrenty it due to improper installation. on the rebuild it got a horn driver .

 

[rabidfish]

Re: 1998 115 X-Flow Rude-fuel situation

At this point... Fix the fuel system. You already know what's wrong with it. Start with a new fuel pick-up and finish with new hose to the engine.(add new everything in between)<br /><br />Then, and only then, can you determine if you even have another problem.<br /><br />Test the warning horn system by grounding all 4 of the sensor wires(if you have only three, then there's no restriction sensor)

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

I'll check on the wiring and get back on that...Thanks.

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

Hey guys, made'er back...<br />Found fuel tank tube had a check valve in the pick-up tube fitting. It required nearly 20 inches of vacume to off-set the ball. I removed and cleaned the check valve, but could not get it to open below 10 inches vacume.<br />I installed a regular nipple in the tank fitting and hooked it up....starts, and runs great (system is 4-wire) and no alarm anymore.<br />Now I'm worried about a syphon condition with the tank higher than carbs....do I need an anti-syphon check valve?????? OR....is that actually what I just removed??????

 

[rabidfish]

Re: 1998 115 X-Flow Rude-fuel situation

That's what you removed. <br /><br />It's not mandatory on that boat, but if it will run with one on it, I would put a new one back in.<br /><br />I have better luck with the brass ones that BRP sells. See your Johnrude dealer.<br /><br />part # 173273 for the 5/16<br />part # 173274 for the 3/8

 

[walleyehed]

Re: 1998 115 X-Flow Rude-fuel situation

Got one coming...thanks.