Carb change
|
|
|
|
After thinking few options about long lasting
carb issues, i decided to try the carb form older EA-71 i had
originally in my craft.
|
|
| |
|
Long term plan is to use DIY standalone EFI
system called MegaSquirt,
but since hardware changes are required for this, i need to save that
for later. I have assembled several boards for sale and will be running
one in atleast one of my cars later. But i need to modify intake
manifold for injectors and that has to wait until i get the craft to
more convevient location. I recently purchase AC/DC TIG welder so
modifying intake manifold to suit my needs won't be a problems after
i'm familiar with AC TIG operation. DC seems to be very easy from the
beginning. More about this later.
|
|
| |
|
Swapping carbs was pretty much straight forward
job. Basic structure is same in both and i already had the choke cable
in the craft. I had to plug some vacuum lines, since newer carb (and
engine) seem to have lot of those compared to carb from older engine.
Before carb was installed, it was cleaned and assembled with new gasket
kit. Also some of the coolant had to drained out since carb is kept
warm by coolant in intake manifold.
|
|
| |
|
With new (old) carb in place engine started
easily, but i couldn't take idle rpms down. So had to adjust cable
length and lever ratios. After that idle was smooth and low compared to
prevois carb. Other thing i noticed very soon was the throttle response
- it was now immediate as it should be. I tested the craft on land with
bow ports open. This way i could give it almost full throttle without
moving too much. Everything seemed to work so we checked everything
before hitting water.
|
|
| |
|
I took the craft to short test drive upriver and
then round some close by islands. Engine feels much stronger now and
seemsto run smoother through rpms. Also there seems to be 100-200rpm
more at the top end, but could be just jumpy tacho needle. Now i can
atleast drive the craft to location where it can be put to trailer and
taken to hull repairs.
|
|