Tohatsu 50D - Running Problems

[hvaldezz]

After all the trials and tribulations the motor is purring like brand new! There were multiple problems, all dealing with fuel fittings and line leaks, bad fuel pump (maybe caused by air getting into the lines), 2 carburetors which had plugged up jetting systems in the weird mid-range jets and just would not come clean. Nasty stuff. LAST BUT NOT LEAST, the primer bulb (which came on a BRAND NEW assembly) was bad. The mechanic and Tohatsu claimed it had been years and years since they had heard of a brand new one being bad out of the box. Since I had replaced this assembly we didn't think it was bad and foolishly I had thrown th old, dried up one away.

So to recap:

I/we replaced the tank, fittings bulb and fuel hoses.
I/we replaced the fuel filter that had been glued by someone else.
I/we replaced the fuel lines (into the filter and out of).
I/we replaced the spark plugs.
I/we overhauled the fuel pump and 3 carbs.
I/we checked the timing which had been mis-adjusted by 1st mechanic.

and of course, replaced the bulb again.

It was a strange problem on the carbs but someone with their own tank and hose with bulb could probably have saved some time on the final running problem.

The 50D is a fine engine when it's running right and I guess I've learned I need to be more careful on using slightly stale gasoline....even if I use StaBil in the tank. I bet it's the same type of problem I have on my pontoon (Merc 60hp). It's starting to display some fuel starvation tendencies also.

Thanks to all, now I can get some sleep.

Henry

[Kelly Hanson East]

Henry - great news!!

All of us on the Board are basking in our genious of calling it a fuel problem of course.

We should rename this thread - the walking advertisement for Fuel injection...

[hvaldezz]

Kelly, everyone on the board that said fuel starvation was the culprit should take a bow! I know I appreciated all the help and support. You guys are a tremendous resource. Free drinks for all someday.

Am sleeping like a log now.

Henry