Author Topic: LA 46 crankshaft different (Read 1599 times)

Paul Taylor · « **on:** April 13, 2016, 08:53:01 PM »

I got some metal Backplates to swap out on two of my LA 46s.
I noticed the crankshafts were different. I pulled them out and weighed them.
One has a counter weight that looks to be cast the other smooth and machined.
The smooth one is 3 grams heavier.
I did a search and did not find much but found one thread that said something about replacing a LA crank
with a FP crank made a difference and some people added weight to the counter weight.

Thoughts?

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Jim Oliver · « **Reply #1 on:** April 14, 2016, 06:05:40 AM »

Paul,
Just wondering if you have any idea of the time of manufacture of the two engines in question?

Of the several LA 46s I have (blue and silver), I think all have the machined shaft.

Jim

Akihiro Danjo · « **Reply #2 on:** April 14, 2016, 10:48:50 AM »

Left one is a very first lot.

Aki

Don Hutchinson AMA5402 · « **Reply #3 on:** April 14, 2016, 01:24:10 PM »

It appears to be timed a skosh differently too.

RandySmith · « **Reply #4 on:** April 14, 2016, 01:35:12 PM »

The early ones had the cast cranks, the later have the heavier ones, they are all still supposed to be for the 35 , 40 FP and 40 46 LA

Randy

Paul Taylor · « **Reply #5 on:** April 14, 2016, 01:48:22 PM »

Thanks guys.

Author Topic: LA 46 crankshaft different (Read 1599 times)

Paul Taylor

LA 46 crankshaft different

Jim Oliver

Re: LA 46 crankshaft different

Akihiro Danjo

Re: LA 46 crankshaft different

Don Hutchinson AMA5402

Re: LA 46 crankshaft different

RandySmith

Re: LA 46 crankshaft different

Paul Taylor

Re: LA 46 crankshaft different