Do I need to take the carbs off?

tfbrown1270

Petty Officer 1st Class
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Sep 5, 2003
Messages
202
I have decided to rebuild the three carbs on my 89 85 hp Force.....I had a hard look at the gazillion or so hoses, linkages, filbertflanges and assorted grapplegrommets on that thing and got cold feet....I think it will be difficult at best to get em off (the bottom one especially) but getting em back on and all the assorted rods attached and synced up again....aaaaaaaaaaagh........so back to my question...do I REALLY need to take these things off or can I just drop the float bowl and work from there?......If they have to come out do I need any special tools.......temperature is -1 (warmest its been in 3 months) or so and I'm itching to get going...<br />Tim
 

JB

Honorary Moderator Emeritus
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Mar 25, 2001
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45,907
Re: Do I need to take the carbs off?

You don't need many special tools, Kenora, but you do need a Repair Manual.<br /><br />Why have you decided to rebuild them? Are they broke or are you just itching to get grease under your nails?<br /><br />To do anything close to a good overhaul they must come off and be totally disassembled.
 

12Footer

Fleet Admiral
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Mar 25, 2001
Messages
8,217
Re: Do I need to take the carbs off?

What's wrong with them? If one is just overflowing, the needle is stuck. This is common on 2 cycle outboards when they sit for a year or so.<br />JB is right tho. To do it right, they get completely torn-down,cleaned spotlessly, and reassembled. You can approach this job as tho they were models that needed to be assembled.<br />Too cold to do it right now, isn't it?<br /> -1* ???? <br /><br /><br />Sometimes, you can "un-stick" them by gently tapping the carb bowl while someone squeezes the primer bulb. If it quits overflowing, you got it.<br />A plugged jet or orifice is not as common, but will cause grief. Depending on the carb spray you use, it's sometimes possible to clear the pickup tube and jet with the bowl off.<br />Running carb cleaner or Seafoam "Deep Creep" (a product I just discovered werks well as a starting fluid for outboards), thru the carbs will disolve goo. You can allow the bowls to fill with "Deep-Creep", let them sit for a while, crank it till it fires briefly, then shut down for another hour.<br />The idle mixture screw should be removed, Carb cleaner spayed-thru the orifice, and re-installed. There is a right and wrong way to do that.<br />Right way is;<br />Get a piece of paper and pen, and write "top", "mid", and "Bottom" on it.<br /><br />Start with the top, and turn it clockwise while counting the turns. Carefull, Do not tighten them! Only until they seat. Write the number of turns down on the paper, so that when you R&R them, you can put them right back where they were. <br />The thing with these adjustments are, they are set to optimimum right now --- unless somebody tried to adjust them better. So when the carb is clean,it will be "as it was originally".
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Do I need to take the carbs off?

kenora<br /> you have tobuy a manual. best on is the factory merc one. but on the bright side they are some of the simplest on the market to do. the manual willalso describe how to service the puddle drains and the fuel pump.<br /> read it a few times and post back. if you buy the merc manual I will dig mine out and try to help
 

tfbrown1270

Petty Officer 1st Class
Joined
Sep 5, 2003
Messages
202
Re: Do I need to take the carbs off?

Hummmmmmmm........it's been -35 to -40 for weeks here so -1 feels like a summer day...I'm in a garage with a wood stove so I can drive the temp up to comforatble.....as for why......it has had trouble idling since I got it 2 years ago....I have had to bump the idle up to 1000 just so it won't quit and thats too fast for trolling (and not so good for the lower end I'm told).....It was suggested that I could get this motor purring with a carb rebuild...(I like 12fotters idea...I have tried the deep creep but never full strength in the carb bowl)....I'm willing BUT it looks like a PIA to disassemble.....not the work...just the multitude of linkages, hoses etc and most in places no adult hand was made to get into....<br />I have access to a Clymer Force O/B 4-150 hp 1984-1986 repair manual..is that the one I need?
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Do I need to take the carbs off?

the carbs should be about the same. a new one can be had for less than 40 dollars. try ebay or amazon. mine are mostly all merc so I cant verify the clymer one.
 
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