Making a test barrel

[KDT1961]

Any good ideas on size, etc of barrel or trash can to use for testing a motor? I have a 1976 75hp stinger, that I am going to need to work on. I ran it for the first time yesterday. It ran great for a couple of minutes, then started bogging down and stalling when I opened up the throttle. It starts fine and will throttle up in neutral, but in gear it bogs down. After reading several posts on here, it looks like I need to go through the fuel system.

Can the prop be removed when testing in a barrel? Is it possible that something is hanging up in the drive that is causing the motor to bog down and stall? It acts like a stick shift car when you let out the clutch while holding the brake. I can back off the throttle and it keeps running.
Dean

 

[wilde1j]

Re: Making a test barrel

No advantage over a hose, unless you make a really big test tank, with baffles, etc. For a 75HP motor, I would expect the tank to need to be 8 ft long or more, from what I've seen dealer use. BTW, running your motor w/o a prop or on the hose doesn't tell much. The motor must be under load (in gear, prop on) to tell very much.

 

[tashasdaddy]

Re: Making a test barrel

use muffs, just for getting it running correctly. even with a big tank, you would need a test wheel. the motor could also overheat quickly in a barrel.

 

[Knotty1]

Re: Making a test barrel

Hello - I'm completely new to all this... just recently picked up a small 15' runabout with an Evinrude Lark IV 40HP - apparently hasnt been run for a while but want to test, clean, tune 'er up... So what is the best way to test out of water? I have an above ground pool.. probably not a good idea though huh? What is this about using a hose???
Thanks - again, I am completely new, so please pardon my ignorance.

 

[tashasdaddy]

Re: Making a test barrel

Knotty1 , sorry but you motor will not work with muffs, you have to use a barrel or tank. pool not good idea, unless you like oil scum on the surface.

 

[R.Johnson]

Re: Making a test barrel

Knobby: I would like to be around, if you use the family pool. But! Not to close around. Talk abound barhtub ring.

 

[KDT1961]

Re: Making a test barrel

use muffs, just for getting it running correctly. even with a big tank, you would need a test wheel. the motor could also overheat quickly in a barrel.

Thanks. I'll stick with the muffs. What about my question concerning something in the lower end/drive hanging up and causing it to bog down? The way it stalls it feels like a car when you let out the clutch with the brake on.
I'm putting a new water pump in it this week, will remove and clean the carbs, check all fuel lines and any vacuum, and wait for my manual to arrive.
Thanks again,
Dean

 

[tashasdaddy]

Re: Making a test barrel

i have the same power head, they are getting ethanol poisioning. see carb cleaning and ethanol here, also check your compression and spark. http://forums.iboats.com/showthread.php?t=299680