motor bogging

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keepitgreen05

Member
i took out the v20 i have just bought. the motor ran fine at home with the muffs on once i put it in the water if bogged out and once i put it in gear it bogged out please any help and i put 25 fresh gallons of gas in today also
 
First two indications I pick on when this happens is contaminated fuel or restricted/clogged jets in the carb bowl.
It don't matter either way, I'll usually pull the bowls and clean the carbs. Normally fixes the problem. If not then at least this part is off my mind.
 
There is a process possible that may not completely fix the problem that most people frown upon but may give a good indication if the bowl and jets needs cleaning.
Unscrew the drain plugs in the bowls, prime the bubble till a good flow of gas comes out, remember the flow, spray carburetor cleaner into the drain but contacting the orifice toward the jet, continue spraying till it sprays unobstructed, immediately prime the bubble to flush the cleaner out, see if the flow improves.
It may take several tries, it may damage the needle seats and/or float, causing you to have to get a rebuilt kit.
Safest, no cost way is to remove the bowls and go from there. Cleaning stubborn jets can be done with a pick method, copper wire is preferred.
 
charlstonsc

did you have the same problem it would run fine at home with the muffs hooked up but once in the water it was a total different story.......if i run it for 10min do you think it will burn it out
 
keepitgreen05 said:
did you have the same problem it would run fine at home with the muffs hooked up but once in the water it was a total different story.......if i run it for 10min do you think it will burn it out
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Not sure what you mean. As long as an engine has cooling you can run it as much as you want, but if you're running it with muffs in the driveway DO NOT take the RPM's over 1500. Letting it sit and idle is fine. Have you tried using SeaFoam in your gas?
 
have aome one o thur your carbs and set them up roght. A carb job on an outboard needs to be done every four to five years. I've got 18 carbs sitting on my bench right now waiting for me to rebuild(BTW, every one of them is a Yamaha)
 
spareparts said:
have aome one o thur your carbs and set them up roght. A carb job on an outboard needs to be done every four to five years. I've got 18 carbs sitting on my bench right now waiting for me to rebuild(BTW, every one of them is a Yamaha)
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I feel your pain Spare. Most of the carbs I do are Yammies. The jets are much smaller and clog easier. Have you ever messed with F40 carbs. They are an absolute nightmare. The best thing they ever did was to make that motor an efi
 
captpete13 said:
I feel your pain Spare. Most of the carbs I do are Yammies. The jets are much smaller and clog easier. Have you ever messed with F40 carbs. They are an absolute nightmare. The best thing they ever did was to make that motor an efi
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I've got a HONDA sitting at the house right now waiting for me to do the carbs. I don't know how bad the YAMAHA's are, but try doing a HONDA sometime. 4 different fuel circuits in them, and they are so small you can't hardly get a torch tip cleaner through the jets to clean em out. Not to mention the whole intake has to come off to do the carbs as the intake wraps around the whole starboard side of the engine block. As for the OP, be careful with those 140 carbs as they are plastic and most carb cleaners will dissolve them to puddy if you aren't careful.
 
One set is off of a F40. The ultrasonic doesa pretty good job cleaning them, If I think they aren't clean enough, I let them sit in the Yamaha cleaner over night. I just got my new set of sync gauges. I've been borrowing a set, figured it was time to but a set
 
I still need to buy a set of guages yet, I don't do enough of em to really justify it so I've just been using a vacuum guage. It gets em pretty close, but takes FOREVER.
 
I really lucked out. My neighbor about 3 doors down used to own a marina. He sold it a while back and offered me some of his special tools at a smoking deal. One of which was a vacumate that I got for $100. Those things are worth their weight in gold. Ferm the Hondas are pretty much the same as Yamahas. We used to be a Honda dealer till Triton got bought by Brunswick. I personally think its easier to pull the intake as an assembly than pulling each carb individually
 
The best way to isolate possible bad fuel, debris, etc in fuel tank is to hook a portable six gallon tank directly to engine. If it runs fine with portable tank with new fuel then problem is with installed tank, ie, bad fuel, bad hose, primer bulb, anti siphon valve, etc.
 
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