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Subject: Onan runs poorly

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rnr42005

Classic Camper
Posts:105

Registered Users
melbourne, fl.

11/07/2007 4:32 AM
we have a 6.5 "P" onan. when we picked up the MH it ran fine. less than an hour later, it was sputtering and shuttuing down. pulled the plugs and they were very dirty from running way to rich. no one in our area stocks them so they should be in later this week. system has clicked 43hrs. since last tune-up/oil change........2-1/2 yrs. ago! cleaned the plugs as best we could and could get it started, but it immediately started hunting, tripped the surge circuit breakers, strong smell of gas and shut down. suspect we will find a stuck float. like the idea of replacing the fuel line and installing a clear filter....hadn't even thought of that. will let you know when we get it going.

1986 Fleetwood Pace Arrow Me, Wife, Daughter and two dogs EVERYTHING IN MODERATION...INCLUDING MODERATION

rnr42005

Classic Camper
Posts:105

Registered Users
melbourne, fl.

02/16/2008 6:38 AM
we are finely about ready to tackle redoing the genset. the parts came in and are just waiting for us. we would also like to replace the supply line. it "disappears" above the fuel tank. do we need to drop the tank some to reach the other end? does it "re-appear" somewhere else that we are not finding? thanks

1986 Fleetwood Pace Arrow Me, Wife, Daughter and two dogs EVERYTHING IN MODERATION...INCLUDING MODERATION

Airstream345 User is Online

Site Host

Classic Master
Posts:1266

Administrators
Louisville, KY

02/16/2008 8:59 AM
Pretty sure it does run up the the top of the tank. I replaced as much of my rubber fuel lines as possible on mine, but stopped short of dropping the tank.

Steven Webster 1986 Airstream Classic 345 Host, ThisOldRV.com

Jim Elliott User is Offline

Camper
Posts:61

Registered Users

02/16/2008 12:42 PM
Posted By Airstream345 on 02/16/2008 8:59 AM Pretty sure it does run up the the top of the tank. I replaced as much of my rubber fuel lines as possible on mine, but stopped short of dropping the tank. Steven, It would be best to drop the tank and replace all of the hoses. I use a hydraulic flat bed lift (500 pound) and they can be found on sale at times for $100.00 or so. When I replaced all of mine with the fuel injection hose was used and sure it's more $$$$$$$$$ but well worth it IMHO. You will also find other uses for the lift like the shop has (rolling around compressors and batteries). Dont know if your genny fuel line is 1/4 or 5/16 but mine is the 5/16. Jim

Jim Elliott User is Offline

Camper
Posts:61

Registered Users

02/27/2008 1:13 PM
That 500 pound lift is on sale at Harbor freight fot $89.82.....Good price IMHO. Another thing I constantly do is pour a few (2-3 OZ) of either "Berryman B-12" or "Sea foam" into a ONE gallon can and pull the hose off of the generator inlet fuel pump. With another hose reconnected into the inlet side of the genny fuel pump it will do two things, One is with "Sea foam" it will decarbonize the engine (under load) and with the Berryman B-12 will clean out your carb...... With the one gallon can the 2nd item will be HOW much your fuel consumption is per gal/hour, Mine with both air conditioners running (17 amps) is one GPH and its a Onan 6500. Jim

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