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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

1996 Yamaha 9.9 4 Stroke

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bobprevost
Deckhand

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4 Posts

Initially Posted - 05/31/2011 : 13:04:35

I recently bought the referenced motor and at the time of purchase (Last Sunday) the motor started right up and purred like a kitten. When I got the boat home, I started the motor again with ease and it ran perfectly for a good 30 minutes. Yesterday I got it out on the water with my father in-law and woo hoo the motor started on the 1st pull so I put in gear and it started to go and then died on me. Now the motor will start, but only run for about 5 seconds before it dies. I fought this issue long enough that I can barely lift my arm today from pulling it so many times. I just paid $1000 for the motor so I'm extremely frustrated...little help?

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cks
Navigator

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126 Posts

Response Posted - 05/31/2011 : 13:09:32

How old was your gas? Do/Did you use something to prevent water separation? I'd also move this over to the general sailing forum-you'll get more responses/help.

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bobprevost
Deckhand

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4 Posts

Response Posted - 05/31/2011 : 13:15:55

I moved the topic, I didn't realize I was in a "specific forum". I'm not sure how old the gas is, it was the gas that the seller had when I bought it. I didn't add anything to the gas to prevent water separation. Sounds to me like a good start would be to simply try some fresh gas? Do I need to add something to prevent water separation?

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DaveR
Master Marine Consultant

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USA
2015 Posts

Response Posted - 05/31/2011 : 18:08:30

It just ran for more than a half hour on that gas right? Probably not the gas. Check and make sure the hose connections to the motor and to the gas tank are air tight. The primer bulb should pump up hard. Did you leave the choke on accidentally? Actuate the kill switch several times to make sure it's getting a good connection. Check any fuel filter and the fuel pick up in the gas tank. Get a new spark plug just for the heck of it, save the old for a back up. Then if none of that works take the carb apart carefully (taking pictures if need be to make sure it goes back together correctly) and blow compressed air though every orifice you can find. Careful of the idle jet (the one actuated by the float), some have seats that will be blown away by the compressed air if you don't remover them first. Good luck!

Oh, and this is a perfectly fine place for your topic.

Edited by - DaveR on 05/31/2011 18:09:47

GaryB
Master Marine Consultant

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USA
4316 Posts

Response Posted - 05/31/2011 : 18:25:50

Did you open the vent on the gas tank before heading out? If not it will eventually cause the motor to die becasue it can't pull fuel into the carb.

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ckroll
1st Mate

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50 Posts

Response Posted - 06/01/2011 : 09:12:40

Man there are so many things it could be...

Soft seize - check to ensure oil pressure - do you have a light on your engine to indicate positive oil pressure?
Soft seize - water is flowing/peeing
Faulty float - pull the carb and inspect
Occluded jets - pull carb, disassemble and clean.

I'm sure others on here can provide some better advice than I. Keep us posted as to what you find out.

Edited by - ckroll on 06/01/2011 09:13:42

islander
Master Marine Consultant

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USA
4034 Posts

Response Posted - 06/01/2011 : 14:36:31

Start with the simple stuff Like Gary said, Is the vent open on the gas can? If you don't know how old the gas is, DUMP IT. Look in the tank for any sediment and start with clean fresh gas.

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jonfew346
1st Mate

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USA
33 Posts

Response Posted - 06/07/2011 : 08:07:24

Check/replace bulb. They will blow up and ruin if the tank vent is left closed in hot weather.

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Jmurfy
Navigator

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USA
176 Posts

Response Posted - 06/11/2011 : 20:56:12

It sounds like something simple. I have a teak deck frame that sits on the sole of my cockpit and it can slide forward or backward about an inch. One time I was entering a small harbor and my 1998 Yamaha 9.9 HP motor died. I quickly found out why. The teak deck had pinched the fuel line.

I hate to ask but did you make sure to have cooling water running into your motor when you ran it at home?

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.