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May 27th, 2021, 06:03 AM   #11
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the early decomp can lose 0.5mm easily (see photo)
the later decomp needs to be 'all the way into the cam'.

regards

Taffy
Attached Thumbnails
2004 FE450 E-start low crank and no start-boat-shaped-decomp2.jpg   2004 FE450 E-start low crank and no start-decomp-real-close2.jpg  
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May 29th, 2021, 06:39 AM   #12
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I found the tip to E-start it in hot engine condition .

I pull decomp lever about 2 cm ,and action the E-start and keep it to rotate engine fast about 1 or 2 seconds and then release the decomp lever to 1cm of the end position (not complete released ), keeping the E-start button to cranck few more times and its starting .

Sometimes I also pull the throttle sleeve a little at the begining of crank but not sure this helps or not , sometimes start fast sometimes i have to cranck 3-4 seconds , or i have to repeat the procedure 2-3 times.
I tried to use the red chocke ( for hot ) , sometimes works but i think its better not use it .

I am 100% sure my autodecomp shaft its worn out of the specs because if i try E-start without the manual decomp the starter will stuck at the begining of crank

Taffy, the autodecomp spring shall i rotate it one time on the shaft (about 180 degrees ) or 2 times or more ? In your movie i seen just one turn over the shaft then lock the spring .

What is the best exhaust tappets play adjustment to help my autodecomp E-start ? 0.10 mm instead 0.20 ?

Last edited by votkarel; May 29th, 2021 at 06:56 AM.
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May 29th, 2021, 07:15 AM   #13
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Originally Posted by votkarel View Post
I found the tip to E-start it in hot engine condition .

I pull decomp lever about 2 cm ,and action the E-start and keep it to rotate engine fast about 1 or 2 seconds and then release the decomp lever to 1cm of the end position (not complete released ), keeping the E-start button to cranck few more times and its starting .

Sometimes I also pull the throttle sleeve a little at the begining of crank but not sure this helps or not , sometimes start fast sometimes i have to cranck 3-4 seconds , or i have to repeat the procedure 2-3 times.
I tried to use the red chocke ( for hot ) , sometimes works but i think its better not use it .

I am 100% sure my autodecomp shaft its worn out of the specs because if i try E-start without the manual decomp the starter will stuck at the begining of crank

Taffy, the autodecomp spring shall i rotate it one time on the shaft (about 180 degrees ) or 2 times or more ? In your movie i seen just one turn over the shaft then lock the spring .

What is the best exhaust tappets play adjustment to help my autodecomp E-start ? 0.10 mm instead 0.20 ?
0.20mm play? Way too much.There's your fault.
Like this there's too much clearance between decomp and rocker roller.
0.09-0.12mm is fine.
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May 29th, 2021, 08:37 PM   #14
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all my tappets are arranged for 1/6 turn of the screw
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May 29th, 2021, 11:29 PM   #15
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Originally Posted by votkarel View Post
all my tappets are arranged for 1/6 turn of the screw

You wrote 0.10mm instead of 0.20mm..
How did you get 0.20mm using the 1/6 method?
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May 30th, 2021, 12:59 AM   #16
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Originally Posted by votkarel View Post
Taffy, the autodecomp spring shall i rotate it one time on the shaft (about 180 degrees ) or 2 times or more ? In your movie i seen just one turn over the shaft then lock the spring
If i recall, from the moment the tail is resting on the cam, I have to wind the spring 270 degrees to make the tail-across-the-middle ready to push forwards and over the slit trench.

the point is, the result must make a 'w-h-a-c-k' noise and not a 'f-l-o-p' noise.

Too much clearance means that the decomp isn't working. You must stick to the correct valve clearance.

1/6th of a turn and Taffy's golden rule; you must be able to morse code the rocker arm and hear tick-tick 'only just' at the rear tail light.

cheers

Taffy

Last edited by Taffy; May 30th, 2021 at 01:52 AM.
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