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When the boat sits for more that a few hours, it has a very hard time starting. It takes 5 minutes of cranking at times to get it started. I seem to be doing everything correctly...choke on, gas on, throttle at idle, cranking in 5 to 10 second intervals, etc. When the engine is warm and turned off, it will start right up. Any ideas? TIA!
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This is a known issue with the Yamaha 1200 engines. The problem is your pop-off pressure is set way too high from the factory. You have two solutions available. The first, is to remove all your carbs and reset all their pop-off pressures with new springs and a gauge. You are probably set around 40-50 now, and setting them to 20-25 will be better. You would also then need to adjust all the low-speed screws. If you were on a ski instead of a boat, this is the direction I would point you, since the other benifit is much crisper throttle response on the low end. Since you're on a boat and can't use the additional responce anyway, I'll suggest the much simpler solution, installing a primer. Buy a tripple cylinder primer kit for around $25 - try www.parkeryamaha.com - then you remove the carbs, remove the choke plates, install the primer fitting instead, remove the choke knob and replace it with the primer plunger, and run the fuel tubes provided from the plunger to the carbs. From then on you will enjoy 2 second starting and you won't be killing your starter and battery. -
If I opened up the caps where the fogging is done and spray in a mixture of gas and oil into each carb, does that have the same effect? If so, how much do I spray into each without flooding the motor? Does this destroy the engine? Thanks - I really enjoy the forums!Comment
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No, that's not the same effect whatsoever. You need to go to your local auto store and get a $1.99 can of Fogging Oil. Gold Eagle is a popular brand, you can even find it at Kmart, Walmart, etc.Comment
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Not looking to fog it, but to get it started when cold. So if one chooses to spray the gas/oil mixture into the engine, would it go into the same area as the fogging oil does? Does spraying the gas/oil mixture have the same effect as installing and using a primer to the boat. Sorry for the confusion!Comment
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Ooooh - LOL ok, I misunderstood [img]smile.gif[/img]
Well, It would certainly start easier than by using the choke, but it will NOT be as good to the engine as using a real primer. Without the equal amount of gas primed into each carb/cylinder, you will have them firing unevenly as it starts. Besides - do you honestly what to go through the trouble of mixing starting fluid, finding something to use to spray it, carry it around, get back in there and remove the caps...every time you want to cold start it? Or would you rather plunge a primer a couple times and hit the start button? [img]graemlins/winkanim.gif[/img]Comment
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