tri moto owners, i need your help!

[PureMetalKorey]

i have a 1983 tri moto 175. i haven't had this thing running in i don't know how long, i work on it, give up, work on it some more, give up, and so on.

i think i may have to ask these questions in steps after confirmation.

first off, it won't start, the carb has been rebuilt more than once, and all seems to be ok with it. i should add that the choke has broken off and i have the choke completely blocked off.

when sprayed with starting fluid, it starts fine and runs fine for as long as the starter fluid lasts. after that it just dies out, and my pulser doesn't seem to be kicking, i have the pulser hooked up to the fitting coming off of the side of the reed housing. i'm pretty positive thats the right place to hook it up.

so i suppose the first question would be, does this seem to be a fuel delivery problem to all of you? if so, is there any common problems you guys have had with this?

i really need feedback on this, i need to get this thing running.

thanks guys!

[james9r9r]

I wish I could help but I cant heres some pics of my 1982 Tri-Moto 175cc.

Tell me what you think

Pics:



*** I was warned once about posting pics w/o a helmet on, while riding***

[pickleweasel_00]

sounds like a fuel delivery problem. Not sure how the fuels system is set up on those but might check all lines for fuel flow (does it have a pump on it or not?), and makes sure the carb is getting fuel and the needle isn't sticking. If it is running on starting fluid, it should run on gas... provided it is getting it. Also from what I understand, these models have an oil injection system on them, and I think the oil line is supposed to go to the reed cage where it mixes with the fuel.

If you have a fuel pump on there (again not too familiar with the 175) it would probably have a vacuum line running to the side of the cylinder like the 250. But if there is no fuel pump ignore all of that And if you don't use the oil injection, mix the gas!

But look the rest of the fuel system over and make sure it'g getting where it is supposed to go

[james9r9r]

Make sure your oil injector is hooked up to the carb or else your 3 wheeler will look like mine.

[PureMetalKorey]

yes, the three wheeler is oil injected, i have the oil injector hooked up in the side of the carb where it's supposed to go,

if i unhook the fuel line from the carb, and turn the gas on, fuel flows freely.

the 175's have a fuel pulser that is hooked up halfway between the tank and the carb, on one end is a fitting for the tank to the pulser, on the other end there is a fitting coming off that goes from the pulser to the carb, but there is a fitting off of the side of the pulser that hooks up to the reed cage i believe.

it's almost like, it's flowing into the carb but the carb isn't moving it where it needs to go.

this thing has got me so aggravated haha

[james9r9r]

Well just look at my Tri-Moto pics

[Tri-Z Pilot]

I have no idea what this pulser is your talkin about, but you have narrowed your fuel problem down between the cylinder and carb. I bet your needle valve is stuck, is the bowl filling up?

[PureMetalKorey]

yes, the bowl is filling up, thats why i can't understand it haha.

i should, be ok if i just hook a line up going from my tank straight to the carb, right?

[PureMetalKorey]

james, do you have a picture of the left side of your three wheeler? if so, you should be able to see the pulser just below the gas tank, mounted to the frame

[Tri-Z Pilot]

So there is fuel in the bowl. Checked the jets for blockage? Cleaned the carb and blew it out with air?

[PureMetalKorey]

yep, actually did that for like the 10th time today, absolutely no blockage, the carb is completely clean, honestly, i just think it might be a faulty carb in some weird way, it's still so clean though, i don't understand it.

[piroguedog]

Man I got my own questions. .................wish i could help.

[Nick_R_23]

This pulsar your talking about, could it be that youre referring to the fuel pump? If so, this would be something to check...usually they are vacuum controlled by a hose to the crankcase...if the hose is leaking then the fuel pump wont work or work crappy. Also check/replace the fuel lines for leaks, Ive had sets that looked fine that had no holes but made the motor run bad if it would start at all. I dont know why, but replacing them solved the problem.

One other thing, I know its a long shot but...check your spark. I have a 77 Yamaha YZ80 that was getting gas and everything, but it would only run on starting fluid. Turned out the coil and stator were both junk and would only produce barely enough spark to ignite the starting fluid. Replaced them and it made a world of difference. Just some things to check.

-Nick

[PureMetalKorey]

yes, i'm talking about the fuel pump, sorry suppose i could have said that from the beginning.

see, i'm confused, because i have a fitting coming out of the crankcase, but i've been told thats a vent hole, so maybe i should have the fuel pump hooked up to that, instead of the reed cage?

maybe i'll change out the fuel lines

[Mr.Jake]

the "pulser" your talking about is the oil injector pump right? If i were you i would completely disconnect and remove the oil injector, with a machine that old, and with most of the tri moto's, they were known to go bad and stop working. Don't trust it and take it off and mix your fuel. But be sure to block off every place were the oil injector hooked up. As for the not starting, Check for air leaks, they could be causing it to not have enough suction to suck in the gas. The rubber flange from the carb to the head is a likely candidate for an air leak. Make sure your needle is in the middle slot, air mixture screw 2-1/4 out (thats what mine is). And what you should do is buy some carb cleaner, the kind you soak the whole carb in. Dissassemble the whole carb and thow all the pieces into the cleaner except the choke plunger (it will swell up and not fit) and take off every o-ring before you throw it in, or they'll all swell up twice the size.