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| '88 90 HP Johnson dies when pushed be... |
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Message |
    
Buddy Lott
New member
Username: p51drvr
Post Number: 1
Registered: 10-2009
| | Posted on Saturday, October 31, 2009 - 08:23 pm: | 
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Just had both carbs rebuilt, a new VRO oil pump, new spark plugs and new fuel lines.
Took it out on the lake today, and everytime the throttle was advanced beyond 2300 - 2500 rpms it would stall.
Mechanic was near, and came out to trouble shoot. 4 new plugs, and a new fuel line (from tank to bulb line), and problem remained.
Left the boat with mechanic. Says it could be loosing spark on high rpm demand. Dual system on a '88 90 Model?
What say ye??
Thanks!!! |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4330
Registered: 04-2006
| | Posted on Saturday, October 31, 2009 - 08:54 pm: |
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Sounds more like the main-jets in one or both carbs are not 'starting'.
Remove all (4) main-jets from carb, and clean manually and blow with compressed air..
Float-level correct set? |
jamie campbell
Advanced Member
Username: outboard_doctor
Post Number: 710
Registered: 02-2009
| | Posted on Saturday, October 31, 2009 - 11:50 pm: |
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If it was a merc i would say yes but im thinking on the same lines as Mort look at the carbies |
Buddy Lott
New member
Username: p51drvr
Post Number: 2
Registered: 10-2009
| | Posted on Sunday, November 01, 2009 - 12:25 am: |
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Great!
I'll get in touch with mechanic! Fuel seemed logical, but the rebuild probably stopped that direction. Worth a look! |
Tim Lyden
Member
Username: tal55lyd
Post Number: 18
Registered: 11-2007
| | Posted on Monday, November 02, 2009 - 08:03 pm: |
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Are your gas tanks vented? could be vacqum lock in tank starving fuel to carbs, air leak in gas line to carbs, sucks air at high demand?
Just a quess
Tim |
jwbmarine
Senior Member
Username: jwbmarine
Post Number: 5087
Registered: 11-2005
| | Posted on Tuesday, November 03, 2009 - 07:29 pm: |
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i agree w/jamie and morty,however,...if the carbs are dirty,they're dirty,and should be disassembled,to clean properly,and get it wking w/out furthur carb problems. |
Buddy Lott
New member
Username: p51drvr
Post Number: 3
Registered: 10-2009
| | Posted on Sunday, November 08, 2009 - 10:10 am: |
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Hey Folks!
It did go back to the mechanic. Sure nuff, it was the high speed jets. Larry (mechanic) said the note with the carb kits suggested the high speed jets should be ok, but he went back in, and they were not. Replaced and set, and the motor/boat runs great. Set of spark plugs for the trouble (he was embarrased for the miss), and I was on my way. I have never worked on a boat motor (cars yes, tractors yes, 2 cycle and 4 cycle motor, etc...) but this site can make it possible. Thanks! |
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