Question about Honda 8 HP Engine

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Won't start, new coil, weak spark,

Honda 8hp electric start motor on a asphalt roller

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If i remember correctly these have electronic ignition the module may need replacing but beforedoing any thing drastic try disconecting the oil alert wire that sometimes gives a bit of pain youdoit

Posted on Jul 27, 2009

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1 Answer

The truck turns but won't start.


have you checked for spark? it has been my experience that most chevys have a problem with electrical stuff when cold. i would check for spark, it may be present but weak. i have a 95 k1500 suburban, and things like window motors and seat motors lag alot when its cold outside. if spark is weak, u may need a new coil

Mar 09, 2013 | 1996 Chevrolet K1500

1 Answer

Dune buggy won't start. Very weak spark


Did you check out the rotor and distributor cap?

Jan 13, 2013 | Cars & Trucks

1 Answer

I have a 2000 XR650R. Weak spark, won't light the


nemaybe--get a clymer manual for engine test--evry part of bike is in detail--haynes also publishes one----is batt at 12.6v--are connections tite and clean

May 22, 2012 | 2000 Honda XR 650 R

1 Answer

Hi there I'm stuck I don't know how to check the


Sorry but they either work or they dont.
If yours isn't working, replace it.
But before you replce it consider checking the other components, because ign mods are exspensive.
it sounds like you've been already checking the other stuff. heres what i'd check if your bike came to my shop.
1. battery fully charged, and can take a load. (weak batteries = weak ign power)
i have a bike that won't fire at all with weak battery. Make sure battery is good.
2. check for spark at plugs, make sure plugs are good. Pull plugs and turn motor over.
rest plug next to head and turn over, do not touch the plug while turning over
or you can be shocked.look for spark.
if you have spark , then you ign mod is working.
if no spark, then check #3
3. power to coils. check the power going into coils,
if power but no spark, then coil is bad.
if no power. check #4
4. power to coils comes from a ignition system ( points/ cdi /ign. module)
there is a stator and a rotor. and a signal generator. on your motor
the signal generator wire sends a signal to the cdi, every time the rotor rotates.
the ignition system (ign.mod) sends power to coil.
so if no signal to the cdi, then signal generator is bad
if signal going into cdi but not sending the power to the coils then the cdi/ ign. mod is bad.

Hope that helps
Best Regards
Big Al

Jun 28, 2011 | 1995 Honda VT 600 C Shadow

1 Answer

The bike is starting only with small plug gap.If we set the gap to original it wont start? tell me the reason?


.....A weak battery comes to mind for starters. A carboned up spark plug is another; start with a new spark plug. If I recall correctly from 39 years ago, your bike has ignition points and condenser. Remove the points cover (on left end of the overhead cam), and check the points. Burned? Pitted? Get a new set of points and condenser but for now, just file the points a bit using an emery board or metal fingernail file. Set the points to .015 clearance at the high point on the cam lobe. If you have a timing light you could check the timing and adjust as needed by rotating the points base plate left or right. Bad points give resistance to the flow of electricity. When the points are closed, the condenser gets charged up. Less electricity going through the points means less of a charge going into the condenser. Now the points open up and the stored charge goes from condenser to coil. The coil then produces a spark. With a low charge in the condenser, the spark is weak and will not jump a wide gap. Set the plug gap to very little and the weak spark can jump the gap. The standard gap is .028. ....... I don't recall when Honda move the points to the flywheel but the images below may help if your bike is that style. Clean any rust on noted parts; magnets and pick up coils. Okay, now I have done my part. Now you gotta do yours; please rate my answer. Thanks! tombones49_177.giftombones49_178.gif

Jun 15, 2011 | 1972 Honda CB 100

1 Answer

1994 honda cbr 600 motorcycle wont start just turns over put new petrol and replaced plugs but still wont start please help


check pulse generator circuit for any opens or shorts..even if you still show a weak purplish/red spark its bad..it must be a big bluish/white spark..check plug #1 for spark and then check #3 foe spark if there both week then its your pulse generators that are bad ..but if one of them has a blushish spark then it that systems coil..eg #1and#4 or the #2and #3 coils..

Aug 19, 2010 | 1994 Honda CBR 600 F(2)R

1 Answer

On a 1989 honda civic 1500 c.c 5 speed...car was parked and not started for 4 months,in the sun and weather conditions..Would not start with ample batery power,plus hot jump.Found weak spark at plugs,I...


no my friend the rebuilt distributer is find, the ignition coil is on the engine block, that is what send sparks to the plugs, may be that is weak

Jun 16, 2010 | 1989 Honda Civic

3 Answers

I got weak spark so wont start got new plug


sounds like oxidization on your timing plate take it out and clean it with a peice of sand paper

Mar 18, 2010 | 2001 Honda NSR 125 R

1 Answer

Cant get a spark on my briggs and stratton 4hp engine, trying to


Doooh!!!! had the coil on backwards this will cause a weak or no spark situation. Should have had my glasses on , there is a faintly perceptable this side out on the new coils. Also there is no mention of this in the directions.

May 18, 2009 | Troy-Bilt Garden

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