ceke

Hi

Need some help with the installation of a new engine as I am not familiar with K&B's.

1. The crank shaft - when I turn it clockwise, it
moves the piston but when I turn it anticlockwise, it
comes out. Should I tighten it by turning it clockwise
while holding on to the piston connecting rod(after
removing the backplate)?

2. On the crank shaft, there is a prop nut, prop
washer, the drive washer and then the crankcase. The
crank case will come out easily. Is it suppose to do
that??

3. Is this a dykes ring engine? Sure looks like one.

Thanks a lot for everything.

Kenny

w8ye

My Feedback: (16)

[ul][*] Yes, Tighten the stud in the crankshaft. I just used my fingers. It has stayed tight. Don't use pliers!
[*] Yes, On the 6550 there should be a tapered cone on the crankshaft for the drive washer to seat against. After you mount a prop on the engine, it should lock in place. Someone may have lost the tapered cone for the inside of the drive washer?
[*] No, they have a conventional ring.
[/ul]

Enjoy,

Jim

ceke

Hi w8ye

Thanks for the advice. Managed to settle the stud problem.

I have the tapered cone but it is not fitted to the crank shaft as it will come loose also. I have found 3 O-rings (2 black- 1 is larger than the other and 1 brownish in color). The one in the centre is rather flat and I wonder whether is is used as a "washer" between the bearings and the tapered cone. I have fitted it on the bearings in one of the pics.

I have included pics for easier reference. If posibble, do let me know the functions of the different O-rings and the flat screw.

Thanks

Kenny

w8ye

My Feedback: (16)

In your first picture, There is a black O-ring that goes around the neck of the carburetor before it is inserted into the crankcase. The screw in the first picture appears to be for a OS engine carburetter retaining screw? The red O-ring is anyone's guess?

There's no O-ring anywhere else on the engine except on some version's carburetors.

The tapered cone slides over the end of the crankshaft with the small end to the outside.

The aluminum washer that is the drive washer fits over the cone with the big internal end over the cone toward's the engine. The serrated part goes toward's the propeller.

When the propeller and propeller and steel washer/nut are applied, it forces the cone against the inner race of the front bearing. This should lock the aluminum drive washer in place over the cone?

ceke

Hi

I refer to picture no 2. Should I place the flat O-ring on the bearing, followed by the tapered cone with drive washer and use the prop to tighten the drive washer into place?

Thanks

Kenny

William Robison

My Feedback: (3)

Kenny:

The cone on the K&B engines is a steep enough taper that it usually doesn't lock in place. Nothing to worry about.

As Jim said, there should be nothing on the crank except the tapered cone, then the prop drive over that. Nothing between the cone and the front of the bearing.

Asking about Dykes rings - the K&B ringed 40 engines have them, but again as Jim said, the 61 has a conventional ring.

Bill.