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Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Onan Engines
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Old 05-18-2017, 09:08 AM
dbuck dbuck is offline
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Join Date: Jun 2009
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Onan BF-MS 2833D. Pulse fuel pump built into carb. Will not pull fuel. I have rebuilt the carb and pump with all new parts. My though is the pulse is too weak from the valve cover. Is their some where else that that I can pick up the pulse? Any ideas/suggestions will be greatly appreciated. Thank you for your time.


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Old 05-18-2017, 09:13 AM
J-Mech J-Mech is offline
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You sure it's not just having trouble priming? That's common after a rebuild.


No, pulse will be the same no matter where you pick it up from.
If the pulse is that weak, then the motor is shot. I doubt weak pulse is the issue.

Edit: I suppose there could be an issue with the vent valve. I'm not too familiar with the Onans. I've worked on them, but not much. Most all small engines have a reed valve. It could be a problem with it. I'd try pouring gas down the carb to get it to run a bit and see if it starting picking up fuel.
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Old 05-20-2017, 01:41 PM
dbuck dbuck is offline
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Quote:
Originally Posted by J-Mech View Post
You sure it's not just having trouble priming? That's common after a rebuild.


No, pulse will be the same no matter where you pick it up from.
If the pulse is that weak, then the motor is shot. I doubt weak pulse is the issue.

Edit: I suppose there could be an issue with the vent valve. I'm not too familiar with the Onans. I've worked on them, but not much. Most all small engines have a reed valve. It could be a problem with it. I'd try pouring gas down the carb to get it to run a bit and see if it starting picking up fuel.
Thank you for your reply. This engine has 110 lbs comp on cyl # 1 and 105 comp on cyl # 2. I've been out of town the last 2 days and when I get back to the shop, I'll pour some gas in the carb and see what happens.
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