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By Dra O
posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
-fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
-along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
-I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
-can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
-it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
-I THINK it has a mikuni model x carb - diaphragm is ID 26mm OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
-last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
-any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
By Trent Finnessey
So I’ve got a 2000 Honda 400ex absolutely love it!! I’ve had it for about a month, I ride with bruteforce 750’s, outlander 850’s and 1000 sxs’s and I was thinking of getting a trx450r carb and a full hmf exhaust. And probably doing the air box mod too, how much power would this give my 400? Just a little different or a big difference? Cuz if it’s not much of a different I’ll just stick with my dg slip on..... thanks!
By Erik Plug
Picked up my first Brute Force yesterday. What should have been an awesome afternoon of riding turn a bit into a deception. As I was unable to really take it out for a test drive at the shop, I decided to buy it and agreed that I would take the test drive at home.
When giving full throttle I noticed that the Brute was choking and lost all of its powers. Faulty fuel pump most likely.
Called the shop and the are coming to pick it up and repair it and bring it back. Good service. Nevertheless feels a bit sour in the mouth as I was told it was a 100% good.
Need to have some patience I now before I can really start riding.
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By Steve Howard
Ran find shut down the quad next day would start and idle when you try to accelerate it would start popping through the carb got a rebuild kit soaked it in chem clean after break down for 12 hours on slow vibrate reassembled and adjusted per manual still the same thing any help would be really appreciated thanks and happy ridding
By Dan Ellsweig
I have a 98 Polaris Magnum 425. Runs GREAT for 10 minutes then starts to load up (sounds rich) and looses power. Final;ly just stalls out on idle. If it sits 20 minutes will run again.
replaced fuel, added fuel treatment (seafoam), Replaced plug (carbon fouled), plug wires, air and fuel filter, checked all fuel and vac hoses, REPLACED carb with new. Still no good. Just ordered a coil, not sure if that will help
Note: both the new and old carb only had the idel adjuster screw - cant find the jet adjustments or air/fuel mix screws so I cannot say how they are set.
Looking for ideas short of spending big $$ on Polaris service
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