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Hi, I have to reset the points on my RM6 Raleigh Runabout. Could you tell me how many mm's before TDC they should begin to open. Thank you. Lawrence Curley.

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When the engine is not running, ideally the points open at TDC...they will advance once the engine is running.
If you don't have a timing light, an old trick I used to use was to get a string of christmas tree lights that had 10 of those tiny lights in series. Why 10? 120V / 10 lights - 12V/light.
If you have a string with 20, you can take 2 in series, but the idea is to clip out one of the lights and put it across your points. slowly rotate the crank in the direction of normal rotation, and the light should come on as you hit TDC (ignition must be on, so remember to remove the sparkplugs!)
If they are off, adjust them, and either come full circle, or go back at least 1/2 revolution and then come back to TDC slowly.
It's an old poor mechanics trick, but I tell ya, it works well!

Posted on Mar 14, 2011

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Posted on Jan 02, 2017

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I would like to know the position of the cam lobes when tdc on a Suzuki dr 500


There are two TDC's, TDC of the compression stroke, both cam lobes will be up, away from the valves. On TDC of the exhaust stroke, the exhaust lobe will be just past the exhaust valve, and the intake lobe will just be ready to open the intake valve. See, as the piston rises on the exhaust stroke, the exhaust valve is open. When piston reaches TDC, the exhaust will close, and the intake will be opening as the piston begins downward again. Coming up on the compression stroke, and on up to TDC, both valves remain closed-lobes are away from valves.

Nov 28, 2013 | Cars & Trucks

1 Answer

MY POINTS OPEN AT TDC. SHOULD THEY NOT CLOSE AT OR NEAR TDC? HOW DO I ADJUST THE TIMING?


Most contact breaker ignition systems, the points should just break before tdc, once you have set the correct breaker gap, you should slacken the screws securing the whloe back plate and rotate either way, the manufacturer of the engine should tell you how many degrees before tdc they should open, small engines normally have marks on the flywheel to tell you.

Jul 16, 2011 | Garden

1 Answer

Briggs 17hp intek overheadvalve on a john deere L100 has developed a hard start hard spin on compression stroke. new battery new starter


hi there

pauly46 here

if engine seems to labour when trying to start as if too much compression ?

try adjusting to in and ex valve clearance to 0.003" inlet and 0.005" ex

inlet valve is the bottom valve, and has a alloy push rod. ex valve is top valve and has steel push rod ( as viewed from the front of the machine with rocker cover off ) )

note rotate engine with plug out to tdc compression stroke , then rotate it down the bore on power stroke by 1/4 inch ( 6.35 mm ) this is the point for setting in / ex valve clearances

manual says 1/4 pst tdc on compression stroke - this eliminates decompressor lift from the setting


cheers hope it hepls

May 01, 2011 | Briggs & Stratton Garden

2 Answers

I removed the distibutor from my 4.9 inline 6 without making any positioning marks. now i can't get the truck to start. i'm reasonably sure that i have found tdc on cylinder one on the correct stroke and...


Hi Mike.

No sir, no computer reset.

Use cylinder #5 TDC compression stroke to set up the timing marks on the harmonic balancer and point the rotor at the #5 ignition terminal on the cap.
Also when you get it running, use #5 wire to set your timing to 10 degrees with the spout connector at the distributor unplugged.
Not sure why Ford used #5 cylinder on the 4.9, probably just a joke by the engineers.

Thank you for using FixYa.

KL

Dec 15, 2010 | 1990 Ford F150

1 Answer

My crank shaft is rotating twise the crank shaft. HOW MY 1342 FIRING WILL OCCURE?, I can spare only 30 digree for charge and spark plug contact. THERE ARE ONLY 2+2 CYLINDER. 180 DIGREE APPART KINDLY REPLY...


Your crankshaft turns 2x times the camshaft. Put it this way as # 1 cylinder reaches TDC (top dead center) of the firing/compression stroke, and this will be after a (8 degs BTDC) spark to ignite the air/fuel mix, the # 3 cyl. will be at BDC of the intake stroke and as #1 begins its power down stroke, (during explosion of air/fuel mix), #3 begins its compression up stroke, the #4 cyl. will be coming down with #1 cyl. but #4 will be in the beginning of its intake down stroke, and #2 cyl. will be coming up with #3 but #2will be in its BDC of the exhaust stroke. Which has just fired previously to #1. 1342134213421342 etc. Now the cam turns to open / close the valves; In the outline above, #1 cyl. valves will both be closed. #3 cyl. will have the intake starting to close at this point. #4 cyl. will just be starting to open its intake valve, and #2 will be starting to open its exhaust valve. Is all this clear as mud? So as the crank makes one full rotation (in a 4cyl. engine) only the firing of one cylinder has happened.and at every rotation one cyl. will fire. So #1 at TDC then one full rotation, #1 back at TDC, but this TDC is half of its 4 cycles, (1)Intake, (2)compression, (3)power, (4)exhaust. this 1234 refers to the 4 cycles of the rotation not firing order.

Oct 31, 2010 | 2008 Volkswagen Jetta

1 Answer

I need to know how to set my cam in time so my car will start



to begin with timing a camshaft, the motor needs to be set at top dead center of the compression stroke. If you are unsure what this means, remove the valve cover on the driver side, rotate the crank pulley with a 32 mm socket, until you see the intake valve, which is the second valve spring, begin to compress. When I say compress, this means the valve spring is opening the valve. As the valve spring begins to close, the piston will be approaching the top of its travel. The crank shaft pulley/harmonic balancer, will have a mark to indicate top dead center on the timing cover. This Mark will align with the TDC mark on the timing cover just after the intake valve spring closes. Next, using a half inch wrench, remove the distributor and set to the side. With a flashlight, look down inside at the oil pump driveshaft. It will have a slot in the center of the gear. This slot should be pointing towards the number one intake manifold bolt hole. It will almost be front to back.


If it is not, using a long flat blade screwdriver, rotate the oil pump driveshaft clockwise until the slot lines up with the number one intake manifold bolt hole. Reinstall the distributor and snug the half inch bolt down. The rotor should be pointing towards the number one cylinder mark on the distributor plate. Reinstall the distributor cap and try to fire the motor over.

Sep 21, 2010 | 1994 Nissan Altima

3 Answers

I have a 1974 yamaha dt 250 and i have spark and fuel but when i try to stat it it will run 4 1 sec or 2 and than when i try to start it again it will backfire witch has led me to think bout the timing...


Hi Cowboyx16The timing on your DT250 is 1.0 mm before top dead center.
That means you will need a dial indicator to insert in the spark plug hole to measure the piston travel.
You will also need a buzz box or a test light to know when the points break.
Set the gap on the points @ 0.016" then adjust the backing plate up or down to get the points to open when the piston hits 1.0 mm before TDC.


I hope this what you were looking for

Feb 18, 2010 | 1974 Yamaha DT 360

1 Answer

How do I change the date and time on my prostar 816 plus


Hi,


ENABLE CUSTOMER PROGRAMMING
 With the handset on-hook, dial #06. The display shows [MMC DISABLED].
 Dial the passcode and 1 and then press #.
At this point, customer programming is open. Follow instructions as needed.

TO SET TIME AND DATE::

Dial #55. Display shows [YY MM DD W HH MM].
Dial new information as follows:
YY = Last two digits of the year
MM = Month (01–12)
DD = Day of the month (01–31)
W = Day of the week (1–7; week begins on Monday and ends on
Sunday)
HH = Hour (use 24 hour clock)
MM = Minutes (00–59)
Dial # to set current date and time. The phone returns to normal use.

And here is the full operational manual:
http://pdf.textfiles.com/manuals/TELECOM-S-Z/Samsung%20Prostar%20816%20Plus%20System%20Admin%20-%20Specia.%20Features%20Guide.pdf

hopefully it works for you.



Aug 26, 2009 | Samsung Prostar 816 Phone

1 Answer

Setting the tappets.


pull the plugs and using a piece of soft wire insert the wire into the plug holes
remove the rocker covers and turn the engine over slowly watching the wire move up and the rockers movement at a point you will see the wire stop coming up and then start going back down
move the crank back and forward until you get no movement and that is TDC
At the point one set of valves will be fully closed and the other set will be in the rocking position ( movement either way allows the exhaust to start closing and the inlet start to opening at the same time
that is when you adjust the valves clearance ( tappets ) on the closed valves
having done that turn the engine over 360 degrees and the valves positions will reverse so you can adjust the next set
when at tdc from the wire check what letter is at the pointer and that will be TDC letter
the D and S will be italian for tdc and ignition

May 31, 2017 | 2002 Moto Guzzi California 1100 EV

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