EvinrudeYachtwin 9.9 on hunter 25.5

[mavriikk]

I am hoping that some one has run into this issue and come up with the resolution for it.

I currently own and operate a Evinrude yachtwin 9.9 i think the year is 89 not positive though. The motor runs great... when it starts. I am having a cold starting issue. The issue is very peculiar though, what happens is i will pump the ball pull the choke, set the throttle to the start position and pull the cord. The motor kicks over immediately and will run for about 4 seconds. If i don't immediately push the choke in and idle the motor up it stalls and then will not start for 15 to 20 mins.

Some times i catch it and sometimes i don't. It is rather embarrassing though when i don't. Then i spend the next 20 mins pulling the cord like and idiot.

I then give it a break and usually just sail off. then when underway i will pull it once and it will fire right up and run completely strong for the duration of the trip.

The reason i want this problem fixed besides embarrassment of course is a safety issue. What happens in emergency when she wants to be temperamental?

Here are some things i have tried and or recently done to the motor.
as far as parts go i have installed a new water pump and exhaust tube. spark plugs are new. Also some electrical work was done on it last year. I also had to remove the water jacket plate on the motor that connected to the pisser. It was all loaded up with salt and corrosion. Cleaned and re-gasket.

Some tricks to starting that have worked are as follow.
take the leg out of the water for a moment the start it and drop it.
while underway the motor seems to start more frequently? dont know why
the other day i cracked the tank cap to release some pressure that was built up, that helped for some reason.

So what is happening is the question i suppose? flooding....? not getting fuel?

Any and all comments are greatly appreciated.
Thanks

Sail Wicked Fast!

K Mello
Bristol, RI

 

[JoeWhite]

I bough my 1984 Hunter 25.5 in 2004. The first thing that I did was to replace the engine with Mercury 4 Cycle 9.9HP and a new engine bracket. 4 cycle is a heavier engine than 2 cycle. I think the engine has had it. It is a safe thing to do. A long shaft of 23" is about $ 2200.00. Its original engine was 25". I hope this helps.

 

[Dennis Kitchen]

Mavriikk.... I'm sure the motor is flooding. It's possible the float needle has a corroded tip or a decayed rubber tip or just buildup of deposits keeping it from closing. Other problems could be metering jets have vibrated loose, float adjustment set incorrectly etc. Sounds like a carburator rebuild is in order.

 

[Rick Webb]

Replace the Needle and Seat and be Sure to Check the Float

I agree that it sounds like it is getting flooded I was going nuts with mine until I realized the float was full of fuel, new float and ran as good as new.

 

[kloudie1]

In addition to a sunk float, I had bugs build a nest in the float bowl air vent tube .. making it a syphon instead of a float bowl..