hard starting 2 stroke

D

DuckDogTitus

New member
just had spring tune ups done and the mechanic said it started fine for him but I'm having a rough time with my 9.9merc 2 stroke.

bulb is primed tight, switch is in the on position, choke is pulled out and twisted to fast.

what happens is if I can get it to start, it kicks over, revs high, then shuts down within a few seconds like its not getting fuel....

quick and easy troubleshooting ideas? i dont like going out without knowing my second motor is in good shape....
 
Fuel vent clogged in the cap of the engines fuel tank or in the closed position. Vent clogged on a separate tank if you are using one?? Float in carburetor stuck?
D.D.
 
Maybe the choke is flooding the motor? You could try to restart on half or no choke once you've got it to fire over.

Also, I've found some two strokes can be sensitive to differences in water cooling sources. I had an evinrude that would run fine on earmuffs, but wouldn't start submerged in the water due to lower compression.

Other than that, two strokes can be a real pain to start if they haven't been run in a while
 
yeah I thought maybe flooded too and tried the same thing but no progress there. this is my third year with this motor and its always started just fine in water or with muffs and I considered myself fortunate to have such a great 2 stroke! LOL

I'll check for clogs tonight and then I'll tinker with the carb some more and see what's up there.

currently i'm using an separate external tank.

I have tried to take very good care of it with seasonal tuneups as well as draining fuel, fogging, etc when not in use. i figured maybe its something i'm doing wrong since the mechanic said he had no problems with it.
 
Dustin -- the choke operates a bit different than you recall. It is a primer. Pull it out and push it in several times. It depresses a primer shooting some gas into the carb. Then, leave it pulled out and crank it over. Should start right up. If not, there is some crud in the float bowl and jets that you will need to clean out, or the lever depressing the primer is broken. It is possible that the primer is worn also -- but try what I suggested first. I don't remember if the fuel line to the motor has a quick connect, but if it does make sure it is pushed on fully. Ron

Also is possible that new plugs are in order. Often new spark plugs solves most 2-stroke problems. Glad you still have the boat. I really liked the way it was set up.

Those old mercs like that are a great motor that are hard to find.
 
Hi Ron, thanks for the tips! here are some replies:

digger":1tzuwx2w said:
Dustin -- the choke operates a bit different than you recall. It is a primer. Pull it out and push it in several times. It depresses a primer shooting some gas into the carb. Then, leave it pulled out and crank it over.
Click to expand...

Did that- got it to start fast but then died.

Should start right up. If not, there is some crud in the float bowl and jets that you will need to clean out, or the lever depressing the primer is broken.
Click to expand...

I'm going to check these tonight-

It is possible that the primer is worn also -- but try what I suggested first. I don't remember if the fuel line to the motor has a quick connect, but if it does make sure it is pushed on fully. Ron
Click to expand...

it does have the quick disconnects, that was the first thing I checked too because it seemed like a fuel delivery issue to me.

Also is possible that new plugs are in order. Often new spark plugs solves most 2-stroke problems.
Click to expand...

Put in new plugs 2 weeks ago for spring tune up :)

Glad you still have the boat. I really liked the way it was set up.
Click to expand...

The boat has served many many uses for us! quite a few long trips in both south sound islands and san juans. last weekend we went to lake sammamish with my 6yr old. l like the annual freshwater dunk to start the season and make sure systems are a go. plus the boy loves it when I drop anchor and we swim off the back before lunch :thup
 
Hi Dustin...when you pull the cover off the kicker, and pull the choke lever, watch the linkage and insure that you see a paddle-type lever depressing a button on the top of the carb. That is what primes the motor. Often you can even hear the gas squirt into the carb. You might also try putting on less speed during start -- it might allow for a richer gas/air mixture initially. I will see if I can find a view of the carb to email you. (Check your email -- I just sent you a photo)
 
So I'm kind of confused to as how enough fuel got into the motor to start a few times and then die considering what I found.

I opened up and learned the moving parts per the diagram Ron sent me (thanks!) but before I decided to really dig in I traced the fuel line back one more time to make sure everything was again secure. it wasn't. I clicked it back on and the motor started up like a top. :oops:

I dont even know what to think. but it runs amazing now. :mrgreen:
 
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