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Crossflow starting
GazzaP - 20/3/07 at 01:40 PM

Hi all

I have just got my engine back from being rebuilt again!!

I am having problems starting it when cranking it over there are flames coming out of the carb and when i removed tha air filter the first choke is jet black. the plugs are black to. I have got a spark and fuel I have checked the cam timing and that is ok could the ignition timing be 180 out?

any help will be appreciated

regards

Gary

02GF74 - 20/3/07 at 02:01 PM

quote:
Originally posted by GazzaP
could the ignition timing be 180 out?


that was my initial reaction.

easy to check, whip out sprk plug no.1, turn engine over by hand a bit, poke a chopstick in the plug hole, turn over a bit more, if chopstic goes up you have found the comnpression or exhaut strok.e

rpelace chopstick with finger turn over, if you feel compression, you have found compression stroke; wind p until nealr TDC then look at the dizzy - rotor arm should be pointing to cylinder no. 1.

check timing too.

if you still have problems, then post again. it would then have to be fule that is not so easy to sort.

Mike S - 20/3/07 at 02:22 PM

May be a stupid question but are you sure that you have got the firing order correct? 1,3,4,2

Mike

procomp - 20/3/07 at 02:28 PM

Hi No dont help him he is quick enough having the engine not working will give some others a chance .

But seriously got to be one of the 2 sugested above.

cheers matt

GazzaP - 20/3/07 at 02:32 PM

Cheers matt

Thanks every one else for your ideas i will check tonight and post back later

Gary

02GF74 - 20/3/07 at 03:01 PM

just a tip; when I was learning the magic trick to start my xflow, I was over choking it resulting in sooted up plugs.

Clean the plugs before trying to start as I found they would not fire when sooted up.

GazzaP - 20/3/07 at 10:03 PM

hi all


I hav tried all of the above and still no joy?

please help

thanks

Gary

rusty nuts - 20/3/07 at 10:16 PM

Start with the basics, check and adjust valve clearances, plug condition and gap , points?, condensor? firing order? With rocker cover off turn engine in D.O.R. until valves on no 4 cylinder (flywheel end) and "rocking" ie one closing and the other opening. set crank pulley so that timing marks align. Check rotor arm which should be pointing to no HT lead . If you have a Bosche distributor there is a small groove in the top face which should be for no one HT lead . Check for carb flooding , rectify as needed. HTH

MikeRJ - 21/3/07 at 09:58 AM

quote:
Originally posted by Mike S
May be a stupid question but are you sure that you have got the firing order correct? 1,3,4,2

Mike


If he has set it at 1,3,4,2 then that will be the problem!

The crossflow has a firing order of 1,2,4,3