tohatsu 30 hp efi 4 stroke

[hipster dufus]

shakedown cruise today. had a problem with my motor sputtering on take off, sounded like it was misfiring. ran fine after a few minutes at wot..shutdown, fish, same problem when i restarted. i had old fuel in the tank, i had treated it with stabil, but it was every bit of 3 + months old. got home and flushed tank, checked tank filter. small amount of trash in tank. will go ahead and take off filter at engine and clean tomorrow. then will run non ethanol nxt time with seafoam. any other ideas and advice are always welcome. the engine has a total of 116 hrs on it. i run a 3 gal tank . i was starting it up every 2 weeks over the winter. put almost 2 hrs on it today.top speed was the same as always at 5500 rpm. like i said any help is appreciated. Paul, u out there?
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[pvanv]

Could be a lot of things, but likely fuel. You might want to drain/clean the vapor separator -- might have something in it.

 

[hipster dufus]

vapor separator? do u mean water separator? i am gonna pull off the cup type fuel filter on the side of the engine, under the cowl. has a white plastic cup on it. once again i appreciate ur help. will try some stuff before i go to the shop. i had planned on putting it in for service at 150 hrs, sometime in july. too hot down here to fish at that time

 

[hipster dufus]

is there some kind of trick to removing the plastic cup on the fuel filter? dont want to use brute strenght and disfigure it. help!

 

[hipster dufus]

couldnt get the cup loose. flushed tank and line. took to lake with non ethanol and seafoem in tank. ran for 1 hr and 15 min with one burp after i let it sit for 10 minutes. still would like to clean/flush fuel filter. talked to a fellow at shop said he works on tohatsus. will try it out for a few trips before i put in shop. any advice is appreciated thanks

 

[pvanv]

There is an aluminum casting bowl that houses the electric fuel feed pump. It has a small brass drain screw. That should be drained any time the boat will be laid up for a month or so. That is the vapor separator. Item 1 in the diagram. There is also the high pressure fuel filter, item 34 in the diagram:

 

[Sea Rider]

If you're talking about the translucid cup (60) is usually hard to remove, E fuels widens and locks cup's upper threads against filter body. Remove fuel body, wrap a thick wooden sanding paper around cup, hold filter body tight, proceed to unscrew cup firmly while applying hand pressure against sanding paper wrap, this simple procedure does the trick most of the times..

Happy Boating

 

[hipster dufus]

ok follow u with the vapor separator. small brass screw on bottom. seen it. tried removing cup with jar openers. did it in place though. will drain vapor separator, and try one more time to loosen cup. i appreciate all the help. i am kinda anal about my equipment, will not run anything but non ethanol from now on.

 

[Sea Rider]

If you can buy higher octane non E fuels, go for it. Fuel filter cups, o'rings, thin fuel pump diaphragms will benefit and last much loooonger.

Happy Boating

 

[hipster dufus]

vapor separator plug is # 9, correct. do u reccomend just draining or disassembly?

 

[pvanv]

vapor separator plug is # 9, correct. do u reccomend just draining or disassembly?

You can just drain. Yes, #9. If you want to get a "flush" effect, remove the plug entirely until the fuel empties. Don't lose the small gasket #10.

 

[hipster dufus]

sea rider, thank u for ur help also. thre 2 of u r lifesavers