Trojan Boat Forum

river!!!
I went to fire up the genny for the first time this year. It did not hit, I know I have spark, so I checked the fuel. Took the fuel line off at the carb, not showing any fuel there when I go to start. I took the fuel line off at the fuel pump, no fuel spitting out of it!! I check and make sure the valve for the gas is open, it appears to me it is. I swear last year I replaced the fuel pump with a new one!!. Could it be so clogged up no fuel can pass? I guess it could be a bad pump, so I guess I should take off, and make sure it works, and if so make sure it getting power. What else to check?? thoughts??

1- What make of generator?
2- What size generator?
3- What year?

onan 6.5kw MCCK circa 1987, thanks

Check for 12voltsthe to fuel pump, if none check it at the oil pressure switch. If both are good check all temp. Hi limits, they should be closed. Also make sure oil level is correct.

Spec J/J1. Thats important to know.

What pump did you put on it when you replaced it? There is an update bulletin that states to use a certain replacement pump on these models. Its a Facet model. I can get you the number if it will help.

Commissionpoint wrote:Spec J/J1. Thats important to know.

What pump did you put on it when you replaced it? There is an update bulletin that states to use a certain replacement pump on these models. Its a Facet model. I can get you the number if it will help.

thank you, yes I used a facet pump. My frustration is, I had it started to winterize it, then I go to un winterize it, and it wont start. so I go to chase down some things, and I dont see it pumping gas. I figure the genny needs gas to start. So I figure, either it is totally stopped up, or the pump is not getting power, or if it is getting power it just does work. My goal is to check for power to the pump, and if I am getting power, take the pump off and see if it needs cleaned and if it still works. thanks is advance.

Certainly try all the items mentioned above but if you have between 1/4 and 1/2 tank of fuel in the tank it draws from, that could be your answer as the fuel pick up for the generator does not go all the way to the bottom of the tank like the engine pick ups do.

Big D wrote:....... the fuel pick up for the generator does not go all the way to the bottom of the tank like the engine pick ups do.

Depends. My set-up draws off the fuel manifold, so I only have one set of pickups and they all draw to the bottom. I tend to either isolate the generator or isolate at least one tank from the generator on the manifold to achieve the same result as a shortened pickup. (gen set can't burn all my gas.)

Engines (including the genset ) should never share fuel feed lines / pick ups in normal opp . And the genset should always have a shorter pick up .

prowlersfish wrote:Engines (including the genset ) should never share fuel feed lines / pick ups in normal opp . And the genset should always have a shorter pick up .

Nothing I can do about that unless I replumb all 4 tanks, and thats DEFINATELY not happening. Evidently its been working fine this way for about 35 years though, so perhaps never is not the correct word.

Commissionpoint wrote:

prowlersfish wrote:Engines (including the genset ) should never share fuel feed lines / pick ups in normal opp . And the genset should always have a shorter pick up .

Nothing I can do about that unless I replumb all 4 tanks, and thats DEFINATELY not happening. Evidently its been working fine this way for about 35 years though, so perhaps never is not the correct word.

The point is not that it won't work but to prevent one from running the fuel down so low with the generator that you don't have enough to get back to port. You however Michael are self aware so no worries for you but that can't be said for all boaters.

Big D wrote:

Commissionpoint wrote:

prowlersfish wrote:Engines (including the genset ) should never share fuel feed lines / pick ups in normal opp . And the genset should always have a shorter pick up .

Nothing I can do about that unless I replumb all 4 tanks, and thats DEFINATELY not happening. Evidently its been working fine this way for about 35 years though, so perhaps never is not the correct word.

The point is not that it won't work but to prevent one from running the fuel down so low with the generator that you don't have enough to get back to port. You however Michael are self aware so no worries for you but that can't be said for all boaters.

Yeh. I definately understand the theory, and the point everyone is making. I fully agree its the best practice. I was just illuminating the fact that not everyone has that setup in practice, and if thats the case, that you should have a plan in place that duplicates the results, or at least as close to that as possible. In my case its either isolating a tank, or isolating the genny.

A little more detail about my setup is that the gen-set draws off the Stbd. rear, upstream of the Stb'd engine, and downstream of the crossover. This way is can pull from either starboard tank depending on which valve(s) you have open on that side. Because the gen-set shutoff sits upstream of both the Stb'd fuel valves and the Engine fuel line, you can open the crossover and run it off either of the Port tanks as well. In fact, I generally use the Port Fwd. tank as my "generator gas", and use my rear tanks for cruising. The Stbd, Fwd. tank is reserved for trolling and 'emergency' gas. Of course with todays fuel, I don't like to let anything sit around for too long, so If I feel its time for some tank or another to get burnt up, that schedule I listed above is certainly adjustable. It just requires changing the combo of whats open and whats closed on the fuel manifold. For the most part, when I get on the hook or at a primitive dock on an island for an extended stay, changing over the fuel supply is part of my regular routine. It comes right before opening a beer, and right after turning down the fridge. That way I can start the genny at will, and not have to worry about the long walk home.

Never is the correct word . Sharing a pick on 2 engines can cause some hard to find issues . Fuel pump fails on a port engine , ok you have the other one until it dies . all because of the port fuel pump . Why ? simple starboard engine starting sucking air through the port engine pump .Been down that road . As bad as the onan pumps are ......... Just because Trojan did it ,don't make it right. If Trojan did it that way .
My book shows the gen set with its own pick up on one of the 4 tanks ( both on gas and diesel ) , The book covers all Trojans but is kind of generic to all models so it maynot be 100% and things change through the years . and Lord help what the other owners have done LOL

prowlersfish wrote:Never is the correct word . Sharing a pick on 2 engines can cause some hard to find issues . Fuel pump fails on a port engine , ok you have the other one until it dies . all because of the port fuel pump . Why ? simple starboard engine starting sucking air through the port engine pump .Been down that road . As bad as the onan pumps are ......... Just because Trojan did it ,don't make it right. If Trojan did it that way .
My book shows the gen set with its own pick up on one of the 4 tanks ( both on gas and diesel ) , The book covers all Trojans but is kind of generic to all models so it maynot be 100% and things change through the years . and Lord help what the other owners have done LOL

I'll try to get you a picture of my fuel mani. Its 6 valves, and its wicked bad news to try to understand if you're bad with fluid mechanics.

I have to send a pic of my doc# to the Park Commission here or they have threatened to ticket me for no reg, so since its in the same place I'll do it at the same time.

The Trojan system diagram seems pretty simple to me . But lets see what you have