1986 Yamaha Bravo

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scott_b

Member
Hi Guys, looking for some ideas on what to try next on the sled my kids play around the property on.

When I put this sled away 2 years ago it ran great, lack of snow kept it stored last year. This year I got it running and it would drive but only with the choke on, cleaned the carb and I am still having issues. The sled will idle fine now but as soon as you give it gas it bogs way down. Half the time it dies, the other half it revs up, jumps forward 20-30 feet and then bogs back down again. Carbs are clean and assembled correctly, spraying starter fluid near the crank seals does not raise the RPM. I would love to get this going for the kids before the snow all melts down here.

Thanks for any advise.
 
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whitedust

Well-known member
I had 1986 Bravo for my kids too. Only trouble I had was I got a little too much fogging oil in the cylinders and the plugs kept fouling right after I put in new plugs. Took the plugs out cycled the cylinders blew out fogging oil cleaned the new plugs ran like a hose. I hope it’s that simple for you good luck. I did have a lawnmower that had dirty pilots ran ruff pulled the pilots again and plugged up again. Could be you have some gunk in the gas lines or tank. Hope not but possible now days.
 
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uperjim

Member
Had an 83 Bravo back in the day. Your description still sounds like a plugged jet but could be a sticky carb float, bad float seat or a glazed over fuel pump diaphragm. If you used gas with ethanol in it and let it sit for a couple years then a good bet would be fuel diaphragm. You can't really tell looking at them whether they are good, if they get glazed they don't work properly which would explain that it idles ok but won't pump a higher volume.
 
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