1988 Evinrude 140 Surging 4500 - 5500 RPM.

[racerone]

Perhaps there is a wee tube / pipe between the 2 pumps.

 

[Chrisravosa36]

But he has fitted 2 new fuel pumps racerone and judging by his questions (no offence chris) there is no way did he drill out the new pump and seal it to the other one.
There seems to be a decent gap between the pumps perhaps chris can tell us but I'm betting they are stand alone otherwise chris would have already shot me down, will 2 pumps run ok off a single pulse line?
Just looking at the picture you'd need 2 gaskets & a metal spacer or 1 very thick gasket to make it work, nice & neat though.
chris will have all the answers as he fitted the new pumps, chris?

BTW racerone will his motor run ok on a single pump?

There IS a gap between the two pumps, although there are two gaskets, they seems to be shot to peices. On the back of the 2 prong pump AND the 3 prong pump there is a small hole that in the same spot, the pulse hole. I Acutally tried running with one 3 prong pump on the lake a week ago, and I only saw 3500RPM. Im tempted to just refit this motor with the CORRECT VRO pump, but disable the oil. Im thinking this is the RIGHT way to do it? I dont want to rig this thing up just to fail again. Not to mention that the previous owner called this fuel setup "a racing system" I completley disregaurding this as "sales talk" untill now lmao.

THanks for all your input guys, much appricated!

 

[Fed]

VROs are very expensive.

There can be NO air leakage anywhere in the pulse system including where the 2 pumps mate together.

When you ran with a single pump did you block off the rear port?

That rear port is a huge air leak unless it's sealed to the block or the other pump.

A bit of googling suggests it will run fine with a single pump.

So, 1)A single pump with the rear hole sealed, 2)Duel pumps with an air connection between the rear holes but no air leaks or 3)A VRO.

Google Images "evinrude vro fuel pump bracket" and you will see there's quite a lot of options out there for bracket mounting a non VRO pump.

To answer your other question, the tank breather must be open while using the motor.

 

[Chrisravosa36]

VROs are very expensive.

There can be NO air leakage anywhere in the pulse system including where the 2 pumps mate together.

When you ran with a single pump did you block off the rear port?

That rear port is a huge air leak unless it's sealed to the block or the other pump.

A bit of googling suggests it will run fine with a single pump.

So, 1)A single pump with the rear hole sealed, 2)Duel pumps with an air connection between the rear holes but no air leaks or 3)A VRO.

Google Images "evinrude vro fuel pump bracket" and you will see there's quite a lot of options out there for bracket mounting a non VRO pump.

To answer your other question, the tank breather must be open while using the motor.

Ok, Ive found a used VRO pump in great condtion, 125$. I went ahead and bought that. This boat will be used for ocean fishing, some offshore. I want to make sure everything is tight on it, and the right equitment. Im still able to return these 2 fuel pumps aswell if the VRO works good. Its the v4 model fit for the 140hp. It should some wensday. Also when i ran the engine, I did not block ANY port of the fuel pump. Just curious what would be the best way to "block" this hole in the fuel pumps.

 

[Fed]

With a gasket against a blank metal plate.

 

[Fed]

Have a read & follow the link.
http://forums.iboats.com/forum/engi...ro-pump-to-standard-fuel-pump-on-90hp-johnson

 

[Chrisravosa36]

Have a read & follow the link.
http://forums.iboats.com/forum/engi...ro-pump-to-standard-fuel-pump-on-90hp-johnson

i might try this...it would be tricky though. where could i get gasket material? So would the metal plate need to have the two bolts holes and the hole in the middle? Could I possibly get the right size washer and gaskets and that may work? Just some ideas..

 

[racerone]

I can not believe there is so much confusion on the conversion for the 90 hp crossflow engine.---The position for the 2 prong pump is there from day one at the factory.-Near the starter and on the intake manifold.--Two screw holes and a plug for the pulse port.--You remove the plug and install the pump with a gasket.---I have a number of big looper V-4 motors and some day might test one with a single fuel pump off a 58 / 59 model 50 hp.----Now that is a pump capable of moving fuel !!

 

[Chrisravosa36]

I can not believe there is so much confusion on the conversion for the 90 hp crossflow engine.---The position for the 2 prong pump is there from day one at the factory.-Near the starter and on the intake manifold.--Two screw holes and a plug for the pulse port.--You remove the plug and install the pump with a gasket.---I have a number of big looper V-4 motors and some day might test one with a single fuel pump off a 58 / 59 model 50 hp.----Now that is a pump capable of moving fuel !!

Yeah, that sure would be intresting lol. My VRO Pump is coming wensday. We will see where that takes me. Id feel much better having the original right equitment.

 

[Fed]

Chris's motor is a 1988 140 HP looper racerone, do they have the holes in the block to mount a single pump?
From what I have read the 140 loopers need 2 pumps but I don't know about your 58/59 one.

i might try this

I'm not sure what you're going to try but if you followed the links then you know single pump is not enough for your motor.

 

[racerone]

I am quite / very familiar with the motors mentioned !-------Own some of both motors mentioned too.------The 140 looper does NOT have a place to directly mount the 2 prong pump.---------The first 50 hp V-4's are legendary for being able to empty a 5 / 6 gallon at full throttle !!

 

[Chrisravosa36]

Chris's motor is a 1988 140 HP looper racerone, do they have the holes in the block to mount a single pump?
From what I have read the 140 loopers need 2 pumps but I don't know about your 58/59 one.


I'm not sure what you're going to try but if you followed the links then you know single pump is not enough for your motor.

Connecting the two pumps, I looked at it again when i got home tonight, and it doesnt look like it would be to easy, as the pulse holes on the back are at slightly diffrent heights. With the VRO Pumps their is 4 Lines right? Oil ( Which will be plugged up), Inlet, Outlet and pulse? thats all?

 

[Fed]

Connecting the two pumps, I looked at it again when i got home tonight, and it doesnt look like it would be to easy, as the pulse holes on the back are at slightly diffrent heights.

Did you follow the links I put up, almost a plug & play set up or you can make your own with gaskets & a 3 hole mounting plate.

With the VRO Pumps their is 4 Lines right? Oil ( Which will be plugged up), Inlet, Outlet and pulse?

Correct.

thats all?

You may also need a pulse limiter if you don't have one. [FONT=Verdana, Arial, Tahoma, Roboto Regular, Geneva, Lucida Grande, Helvetica Neue, sans-serif]# 0435010[/FONT]

 

[Chrisravosa36]

Did you follow the links I put up, almost a plug & play set up or you can make your own with gaskets & a 3 hole mounting plate.


Correct.


You may also need a pulse limiter if you don't have one. [FONT=Verdana, Arial, Tahoma, Roboto Regular, Geneva, Lucida Grande, Helvetica Neue, sans-serif]# 0435010[/FONT]

I doesnt look like I have a pulse limitor, what is the deciding factor which I may need one?

 

[Fed]

As far as I know they were fitted to all motors with VROs or at least VRO2s.
Apparently they are to stop a backfire rupturing the VRO diaphragm.

 

[Chrisravosa36]

As far as I know they were fitted to all motors with VROs or at least VRO2s.
Apparently they are to stop a backfire rupturing the VRO diaphragm.

Would it be dangerous to run the motor without this? I dont belive the pump im getting comes with this.

 

[Chrisravosa36]

As far as I know they were fitted to all motors with VROs or at least VRO2s.
Apparently they are to stop a backfire rupturing the VRO diaphragm.

Would it be dangerous to run the motor without this? I dont belive the pump im getting comes with this.

 

[racerone]

The VRO pump is big relative to the regular pump.-The VRO is plastic held together with wee screws.---A pressure spike from the crankcase would likely crack / blow up the VRO pump.----The pulse limiter is a " flow fuse "---It closes when too much air is going through it !!

 

[Chrisravosa36]

The VRO pump is big relative to the regular pump.-The VRO is plastic held together with wee screws.---A pressure spike from the crankcase would likely crack / blow up the VRO pump.----The pulse limiter is a " flow fuse "---It closes when too much air is going through it !!

Well, I discovered by looking at the parts chart and motor that I have one built in, So I went ahead and threw the VRO PUMP ( Johnson Evinrude Fuel Pump VRO 0174619 1988 V4) on the motor. I started the motor on the hose, and I noticed the bulb did NOT get hard like it did before, then i smelled gas so I looked around, and it was coming from the thru hub exhaust. )Basically out of the prop) I Thought that was strange, so ran it it coughed and was smoking more than usual. It wouldn't idle nice and died when trying to pop it in and out of gear. I than decided to take it to the lake and see what would happen. Fresh gas, Stabilized and 13 oz of oil for 5 Gallons It did the same their. I putted around kept dieing, at W.O.T it was struggling. And I could see the gas coming in the water. I pumped the bulb a few times, then it would shut off. I know I installed the V.R.O correctly. I anchored down and took a look at it. I pumped the ball 5 or so times, and I tried to start it, and it wouldn't budge, the combustion chamber must be full of gas?? I than proceeded to take of the flywheel and move the motor with my hands, in fear I would hydrolock the thing. We putted back to the ramp, thinking it would be a VRO problem. He hoped in his truck, grabbed the old fuel pump setup I had, I put it back on, started it, idled better, but 30 seconds after being in gear, died out and acted the same as the VRO pump. Im at a loss. I couldn't nail this down. I rebuilt the carbs not long ago maybe 2 - 3 weeks? I didn't screw with the carbs after that, and this didn't happen when I went out last week. The only thing I did was replace a cracked cam roller. Which frankly I don't see this causing a problem. Im guessing stuck float? Bad reeds? Cracked block ? Bad Gasket? Not sure but I was planning on getting this in the water this saturday but guess not... Any tips would be great. I also got stopped by the Environment Police, very nice guys tried to help me out, checked all my safety equipment and offered any and all assistance lol


Thanks for all your help thus far!!!

 

[Chrisravosa36]

Could this also be a bad quick start thing. Im not sure the right name for it, I belive a better name would be the automatic choke? The thing with the red handle? Could it be squirting fuel in? But that would make no sence beucase the primer ball is the factor that makes it squirt fuel out of the exsuast. I dont see ANY fuel leaking in the engine though. Quite od.