Did I screw up: Old fuel left in carb?

Tom · Post by **Tom** » May 10th, 2006, 12:04 pm

'98 Yamaha 200 SWS II not been run for months. Did not drain fuel. Had stabil in tank. I just looked in each carb via drain bolt and most were empty, some had small amount of oily mix drip out.

Did I screw up? Can I run engine or do I need to clean out varnish, etc. in carbs? How do I do this? Any tips? Can I safely run engine with water hose attachment on port side? How long? Thanks.

Post by **MudDucker** » May 10th, 2006, 12:58 pm

If you had stabil in the tank, you might be alright. Gas turns into a varnish like crude when it evaporates. That crude clogs jets and keeps boat mechanics in business. It should not hurt to try and crank it on the hose. I've been told that it is better to use the hold clamp on water source than the built in hose on Yammies.

Post by GC » May 10th, 2006, 1:22 pm

I've been told you should NEVER run an engine on the hose attachment, it's only for flushing with the engine off.....it does not supply water to the pump!!! Check your owners manual.

I always use the muffs on mine.

Post by **Fish Masterson** » May 10th, 2006, 9:12 pm

It wouldn't hurt to add the appropriate amount of Sea Foam to the tank to help clean out the carbs and condition the fuel.

catchin1 · Post by **catchin1** » May 12th, 2006, 9:07 am

Like MD said won't hurt to try and crank. If you get it cranked let it run awhile. They longer it runs the better, the gas flow will help clean it out. Could save you a repair bill.

Post by **wevans** » May 12th, 2006, 9:32 am

Pump the carbs full of fuel and drain them a couple times before cranking, this will help clean the bowl out

ALWAYS use ear muff type flusher when running, the hose attachment is for flushing the motor without running it

dstockwell · Post by **dstockwell** » May 12th, 2006, 10:48 am

wevans wrote:the hose attachment is for flushing the motor without running it

Not on a Merc, you can run at idle on the hose attachment.

Post by **KarstRanger** » May 20th, 2006, 2:33 pm

Fish Masterson wrote:It wouldn't hurt to add the appropriate amount of Sea Foam to the tank to help clean out the carbs and condition the fuel.

What's Sea Foam? If it is a new gas tank crud cleaner, if I don't need it now, I will for the next old rototiller or outboard I get.

Post by **mjsigns** » May 20th, 2006, 6:43 pm

Tom-

You're screwed. I'll come by and pick remove the old motor for free and dispose of it properly. Just PM me

Post by **Fish Masterson** » May 20th, 2006, 11:48 pm

KarstRanger, Sea Foam has been around for awhile, and alot of people swear by it. They sell it at most auto parts stores. It is supposed to stabilize and condition fuel, as well as help remove water, and clean the carbs.