roadx wrote:
First I would like to say Hi.. and what a great site for info.
I purchased a 89 fl400 pilot not running. symptoms are hard starting, backfiring and in general just wont run correctly
these are the things I have checked or replaced and the to do list.
1. reeds have been replaced with boyesen stock pro reeds. found reeds burnt probably from backfiring. reed cage is fine and reused with new gaskets. intake manifold looks, good no cracks
2. carburetor has been cleaned and rebuilt with stock main #140 and idle jet #52 and float level set. air-fuel has been set to 1 1/8 turns out. needle jet set on second clip from top. air filter replaced with foam INA filter and oiled.
3. new fuel lines. I haven't check fuel flow because I cant get it to idle for a correct fuel flow reading. gas lines fill up so at this point I will assume it is getting correct amount of fuel. I do have a new Polaris fuel pump. vacuum line has been replaced. OEM fuel filter cleaned, gas tank is free from rust.
4. new spark plug. NGK br7es gap checked
5. compression is at 140 psi. when I replaced the reeds I viewed the piston through the intake. looks good, no scratching, rubbing or gulling.
Ok.... now for the things on the to do list.
1. I tested the coil and found the coil boot to be bad. removed boot and exposed the wire then wrapped it around the spark plug for a temporary test. it did seem to run better but hard to tell until a receive new coil. coil tested. across coil green black .03 ohms. coil green to spark plug lead 4.18 ohm and same with black 4.18 ohms without boot. spark plug boot open no continuity. replacing coil
2. pressure test lower end. DYI pressure tester. have parts on order. low pressure gauge, schrader valve, freeze plug, various pvc parts.
3. new belts on order from 4x4 tuff
if interested? I will keep ya guys posted with my progress. Is there anything you suggest checking while parts arrive?
is it possible to use a fuel tee off a 250 or 350? part # 16710-VM0-770
thanks!!
Welcome new guy.
It appears you have the fundamentals down. Obviously mechanically inclined.
"if interested" ------- we always are here.
You do not need to have the machine run to check the fuel flow. I just use the starter. Remove line from carb and pump into a measuring cup. You need 4.5oz in 10sec approx. If you are not getting this then the "T" check valve may be no good. You don't need the stock Honda "T". You can make your own check valves like I did for my FL350's
viewtopic.php?f=1&t=17832You said it is backfiring and it is not running. My money says you sheared the key on the flywheel.
Note: this backfiring may happen when you got a huge air leak. That's deadly to a two stroke. My money is still on the sheared key.