Another #%@$&^*$ Lesson Learned

[phwrd]

Installed a Flo Meter, new sending unit, all new lines for the fuel system. Racor water seperator, added a 10 micron filter, even a shut off valve. Bulb fills with fuel, the filters fill with fuel.

Then why won't the motor pick up fuel above idle off the internal (aluminum) fuel tank? Finally took it to a mechanic, Flow turbine is good, fuel gauge now works, filters are clean, gas is good. So why can't I get the motor to stay runnning.

He determined that the hose is either twisted, kinked or defective, between the meter and the filter. Longest run on the boat, 6 foot. Now have to take the boat apart again to replace a $20 piece of hose.

Run H2O or air thru hoses or tubes to make sure they are good before you install them....

Just another hard knocks lesson i would like pass on, maybe save someone else the pain . . .

 

[79monarch]

Re: Another #%@$&^*$ Lesson Learned

I'm somewhat new to boats so I don't know if it would even be possible on a boat tank and I'm also pretty sure that the mechanic or yourself would've checked it if it is but just in case I'll ask anyways. Is your tank venting properly?

 

[danond]

Re: Another #%@$&^*$ Lesson Learned

Agreed. Have you tried running it without the gas cap?

 

[jonesg]

Re: Another #%@$&^*$ Lesson Learned

All subdeck areas should have access.
Especially areas with consumable equipment.

 

[phwrd]

Re: Another #%@$&^*$ Lesson Learned

Thanks all for the advise,

I will check the venting before taking anything apart. I do have access to the consumables, just not that hose run.

 

[Gary H NC]

Re: Another #%@$&^*$ Lesson Learned

Hard to think that double walled fuel line would be twisted to the point of causing a restriction...
I have noticed some of the brands of new fuel line sure are not as thick as they used to be so i guess anything is possible..

 

[doctordelerious]

Re: Another #%@$&^*$ Lesson Learned

I have seen flex brake kines develop an anurism within the inner walls which would cause a restriction but not very common, could it be sucking air ?

 

[Kettler]

Re: Another #%@$&^*$ Lesson Learned

I had a similar problem which turned out to be a fauly check valve in the fuel bulb assy. Bought a new bulb and was up and running.

 

[P 0 P E Y E]

Re: Another #%@$&^*$ Lesson Learned

Sorry to hear your having troubles.

Generally not a good idea to test a fuel system with water.
We go to painstaking lengths to keep water away from fuel systems.

Take your time and trace out the problem. By pass the questionable zones.

 

[phwrd]

Re: Another #%@$&^*$ Lesson Learned

Turns out the the lines don't have a kink in them, they do have air running through them.

Working to find the connection that is leaking air, but not gas.

Why would air in the lines cause problems in the carbs / fuel pump ?

Thanks

 

[Bondo]

Re: Another #%@$&^*$ Lesson Learned

Why would air Leaks in the lines cause problems in the carbs / fuel pump ?

Because fuelpumps are supposed to suck Fuel, not air...

 

[45Auto]

Re: Another #%@$&^*$ Lesson Learned

Why would air in the lines cause problems in the carbs / fuel pump ?

Take a drinking straw and put it in a glass of water and suck up a drink of water. Now cut a hole in the straw above the water level and try to suck up another drink of water.

Same thing is happening to your fuel pump.

 

[Silvertip]

Re: Another #%@$&^*$ Lesson Learned

If you forced air through the lines and that air happened to pass through the turbine you probably will be looking for a new one. Air pressure can kill them very easily. Check the arrow on the bulb -- it should point toward the engine as that's the direction of fuel flow. It would not be the first time this mistake was made.

 

[phwrd]

Re: Another #%@$&^*$ Lesson Learned

You guys are "damn blum Genius". That is why I love this site, so many people who have been there, done that.

Taking your advise, testing each piece and connection by running on a seperate bulb assembly from a portable tank of fresh gas. Arrow in the right direction.

I replaced all of the fuel hose on the motor, am changing both of the connectors at the motor, (quick connect). But did remove both for testing.

We did run the motor from the portable take last weekend with straight clamps and it did run better, no air in the lines, but still a bit of spluttering a mid rpms. Got it up to 5200 rpm, kept it back off at 4800, which is what is listed at the WOT.

Might be a prop issue, but for another day.

Can't get down there until this upcoming weekend to test everything. But I will keep you updated.

Thanks again & i will update you on it.

 

[Jeep Man]

Re: Another #%@$&^*$ Lesson Learned

You guys are "damn blum Genius". That is why I love this site, so many people who have been there, done that.

Taking your advise, testing each piece and connection by running on a seperate bulb assembly from a portable tank of fresh gas. Arrow in the right direction.

I replaced all of the fuel hose on the motor, am changing both of the connectors at the motor, (quick connect). But did remove both for testing.

We did run the motor from the portable take last weekend with straight clamps and it did run better, no air in the lines, but still a bit of spluttering a mid rpms. Got it up to 5200 rpm, kept it back off at 4800, which is what is listed at the WOT.

Might be a prop issue, but for another day.

Can't get down there until this upcoming weekend to test everything. But I will keep you updated.

Thanks again & i will update you on it.

We have the solution for that as well......probably. What motor, year and size.

 

[phwrd]

Re: Another #%@$&^*$ Lesson Learned

I am running a 1989 Suzuki DT-140, 4 cylinder, 2-stroke, with the oil injection bypassed. It has a 13 X 19 stainless prop. The boat is 19.5 foot (5.2 meter), late 1980's Arrow Glass Coho v-hull, that sits higher in the water than I thought it would.

I wonder if the wrong prop size is the reason that I had to replace the lower unit. Thinking of buying an aluminum prop, so that when I hit something ( & i probably will), the prop will give before the lower unit.

Just don't know which way to go, want to bring the rpm's down & torque down, while keeping the speed up.

Any ideas ?