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Catalina/Capri 25/250 Sailor's Forums

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O/B Engine hiccup

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thacket3
Navigator

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USA
101 Posts

Initially Posted - 10/10/2005 : 11:25:23

This weekend I was down at the boat getting ready to take some friends out for a day on Biscayne Bay. I went down early to wash the boat and get it ready for the trip. I tried to start my 1.5 year old Nissan 9.8 2 stroke and for the first time ever. No go. It would crank and crank, but nothing. I would try cranking for a bit, then go back to cleaning. So after an hour and about 10 attempts to get it to fire, I called all and canceled the day.

As I was tilting the engine up to get the end out of the water, a large hiccup of gas came out of the prop, and the "weep hole" on the back of the shaft flushed out some fuel as well.

So, I have to go pull the engine and take it down to Key Largo, (the closest Nissan repair in the area) and find out what has happened. Just out of curiosity, anybody have any thoughts? When I would try to crank it I would only cycle it for about 5-6 seconds at a time and only for a minute total each time. Then I would leave it for 5 minutes and go back. I tried several times to use the pull rope as well.

This is the first issue I have had with the engine since I got it new last year. Oh, also, I had it running about two / three weeks ago, no problem. I am very particular with it's upkeep as well. I flush it out after every use and have kept the maintenance up to par.

Just wondering ya'lls thoughts.
Tim

Edited by - on

frankr
Captain

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256 Posts

Response Posted - 10/10/2005 : 12:32:36

If the carb has a float or diaphram it may have stuck in the open position which would allow fuel to flow straight through and into the cylinder(s). There is a small pin that seals the fuel inlet. When you tilted it and any exhaust valve would have left the excess fuel flow out the exhaust tube.

Edited by - on

atgep
Master Marine Consultant

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1009 Posts

Response Posted - 10/10/2005 : 14:01:11

Before you make that trek here are a few things to check.

#1 Kill switch. Make sure the little tang is installed. If it is, pull it out and cycle it a few times. If you have a multimeter, check for continuity. It should show in the manual which wire to check.

#2 Try engine. If still no luck, pull the spark plugs. Are they wet? If so, (remove kill switch) and crank engine over to clear fuel out. Then put kill switch back in and crank engine with spark plug attached and touching ground to check for spark. (only do this if you are reasonably sure no gas spray, fumes or vapor will ignite)

#3 If spark is present, replace plugs and try to start engine. If it does not, look at carb. You can check for a stuck float by tilting engine and pumping primer bulb. If gas flows out of carb, you have something amiss inside the carb. sometimes a gentle rap from a rubber mallet will suffice. If all this fails, take it to the dealer.

Check the kill switch first though.

Tom.

Edited by - on

Bubba
Admiral

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USA
542 Posts

Response Posted - 10/11/2005 : 21:20:20

Another thought since it sounds like it was flooded:
Did you leave the fuel line connected and the fuel tank vent closed since you last used it? I'm wondering if the tank got hot during the day and the pressure forced a lot of fuel into the carb. Since it's a 2-stroke, that fuel will go everywhere.
I leave my fuel tank vent cracked open a tiny bit when I'm not using it.
Either way, Tom's offered good suggestions.

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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 10/11/2005 : 23:31:12

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Bubba
 
I leave my fuel tank vent cracked open a tiny bit when I'm not using it.
<hr height="1" noshade id="quote"></blockquote id="quote">
If your climate is damp and the temp goes up and down much, you should close the vent, especially overnight, to minimize condensation in the tank. But that's probably not relevant to your starting problem... I like one of Tom's suggestions--I've forgotten about the Honda man-overboard switch and made a fool of myself at least once!

Edited by - on

thacket3
Navigator

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USA
101 Posts

Response Posted - 10/12/2005 : 09:55:21

I had thought of the kill switch when I was trying it this last weekend. I didn't have a meter with me, but am going to try it out this afternoon. I don't keep the fuel line connected either. So, i am going to try all of the above this afternoon. If I can't get it to go, then I will pull it off and head down to the keys for help.
Thanks all for your help!
Tim

Edited by - on

Ericson33
Admiral

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USA
892 Posts

Response Posted - 10/12/2005 : 11:44:46

Ok, I still fell really stupid about this but I will share with the group, We went out on a good windy day last year, I was raising the main sail, and shut off the moter by pulling the man overboard thing. We had a nice sail and we were comming back into the bay, I turned around to start the moter, and could not get it to turn over, At this point I didnt know what I was going to do, I did this for 2 min or so, I faced the boat into the wind luffing the sail, I took the cover off the back of the moter and realized that I had left it stuck into gear......... Ah It won't start in gear. I replaced the cover and it fired right up.

Edited by - on

dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 10/12/2005 : 12:39:37

Your outboard may have a safety switch that prevents the motor from firing when the shifter is in nuetral and the throttle is not in the starting position. If this is the case, try rotating the throttle handle around the idle position to find the sweet spot that will allow your motor to fire.

Edited by - on

Ben - FL
Admiral

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880 Posts

Response Posted - 10/13/2005 : 17:05:01

As long as everybody is 'fessing up I have to say one day I had my sister-n-law and her son meet me at Desi, my previous C-22. After trying and trying to crank the Mariner I had to send them away.

It was just after they left I finally noticed the dead man switch was disconnected.

How it got that way I don't know. But that was all it took to crank the motor with a few pulls.

I felt bad for the kid who missed out.

But I have since taken them out on Chick-a-pea.

Edited by - on

Ben - FL
Admiral

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880 Posts

Response Posted - 10/13/2005 : 17:08:59

PS. Tom, the Fleet 25 logo looks good! Hope you don't mind if I copy and paste it?

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atgep
Master Marine Consultant

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1009 Posts

Response Posted - 10/13/2005 : 17:58:02

Ben, Thank Jerry. That is where I got it.

Tom.

Edited by - on

Bubba
Admiral

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USA
542 Posts

Response Posted - 10/13/2005 : 20:32:37

Tim,
Even if you do have to take it to the shop, isn't it nice that it is an outboard? You can pop it off and put it in the trunk of your car. Imagine if you were having this problem with an inboad auxiliary!

Edited by - on

thacket3
Navigator

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USA
101 Posts

Response Posted - 10/14/2005 : 09:53:10

Absolutley! It definatley beats hiring someone to come to me. Can't imagine what that would cost.

Tim

Edited by - on

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