Ok one more test on the injection system. but what does this mean??

[drewmitch44]

Im looking at a service manual and it states during the output rate test. It says to run at 1500 rpm for 3 min. and measure the cc's out of each oil line with the oil pump set at full stroke. Thats what i dont understand. What is full stroke. Is that saying i disconnect the linkage and let the oil pump open up to full pump? It sounds like thats what its saying. and it also says that i should not measure the oil by letting it drip into a contaner then sucking it up with a syringe. I have been doing it that way so maybee thats why my tests were low. Also it states that you should disconnect the linkage to the oil pump. My question is how is that allowing the test to be accurate? And what is full stroke of the oil pump. Im guessing its the most open possition for the oil pump like when the throttle goes to wot that is where is goes. Any help would be apreciated guys i been messing with this thing too long now. lol

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

Sorry this is a yamaha 115 etlj a 1986. Sorry i didnt add that.

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

Ok i just ran the test 2 times. The first time i left the linkage hooked up and i got just under 2 cc's of oil in the 3 min at 1500 rpm. The second test i unhooked the linkage at the oil pump and it was in the possition like it would be if the motor was full throtle. I dont know if this is ment when "oil pump set at full stroke" is said. anyway the 2nd time i got about 3.5 cc's. Is this how im supposed to check it or not? After that there is still a adjustment at the linkage to open the oil pump more or close it. Im not sure what to do here? Someone please help. Rodbolt if you can help me out id love it. I can even pm you if you dont mind.

 

[rodbolt]

Re: Ok one more test on the injection system. but what does this mean??

your second test is correct.
if your running the oil output with the linkage connected its wrong.

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

So im good then?? I got the correct output on the 2nd test where the linkage was not hooked up. After that i hooked up the linkage and there is an adjustment on the linkage that i adjusted so that the oil pump opened up as much as possible. It hits all the way open at full throttle is that how im supposed to adjust that linkage?? I think im getting the propper flow now from the oil tank in face when i got it all hooked up i ran the motor with strait gas for about 10 min. I varried the idle from 800 to 1200 to 1500 and the oil pump opens a little bit each time i advance the throttle. The thing now is im not sure how to adjust that linkage that connects to the oil pump. What output should i be getting when the linkage is connected? And what you are saying is that the test should be run with the oil pump linkage disconnected and the oil pump all the way open? Thanks a lot man i think im getting this thing all figured out finally. I was close to unhooking and premixing but it dosent look like im going to have too.

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

Anyone know? Just trying to get this thing figured out for good!

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

ok im running on strait gas now!!! whew no more crazy ammount of smoke! Its great to run from strait gas. Thanks everyone that helped me. And thank you iboats for this forum id never be where i am without this site here!!

 

[drewmitch44]

Re: Ok one more test on the injection system. but what does this mean??

Took it out on the water this afternoon and ran straight gas! hehe. I adjusted that linkage so that its almost as open as i can get it. When its at wot possition its all the way open. If that linkage is disconnected and i move the arm it feels like it only matters the 1st inch or so it moves. I think that after an inch the arm will move but the pump just pumps as much as it can. Like at idle the arm is closer to the boat and at about half throttle its at about half open but i think that even at half open it is pumping full. If that makes any sence. Anyways i just wanted to say thanks for all the help and im glad now that i didnt just disconnect the pump and pre-mix. It starts much easier when cold now that im not pre-mixing. I think the oil in the gas was making it harder for the motor to start when cold. Now to tackle the cooling i want to redo all of that. That is my next project on the motor.