clean the carbys probably fuel of crap

You have said a few things that I can't quite follow ie:

It takes a bit to get going in the morning, then say like 10 - 15 I presume that this is the amount of attempts to get it going. It is a two stroke right.

Then you say when you over rev it with manual choke /throttle an alarm sounds.

What I would look at (when at home) first thing in the morning pull the plugs and have a look at the condition of the gap between plug anvil and body. Has the plug got a build up of soot or oil in this area. Connect the plug to the lead when out of the motor and see what sort of spark is being generated, do this to all the plugs.
If there is not a bright blue coloured spark, it may be that the plugs are contaminated with oil or carbon or moisture.
If plug comes out "wet" ascertain if it is fuel that is present on the plug.
If "wetness (dark grey) in appearance then I would suggest when the choke is applied to much fuel is getting through.
Use less choke, however carry out the following to ascertain if the problem is electrical or fuel supply/flooding.

Clean around the body of the plug between the centre core of the plug and the steel body, then clean the area between the anvil and the centre core of the plug. After cleaning both areas holding the plug body side up clean with petrol and brush shaking the plug to remove any gunk from within the body of the plug and try the plug again for strength of spark.

What the above is trying to ascertain is if the plugs are fouled up and as you attempt to start the motor this accumulated gung is washed away by fuel. Thus after some attempts to start plugs have been clean by fuel and motor starts.

If you don't get any spark when testing plugs the I suggest you have a magneto problem which I have no suggestions on how to rectify, sorry.

 Sounds like once the fuels primed she’s good to go , maybe it’s sucking air initially on the cold start somewhere along the line .  I don’t usually comment on mechanical issues but thought I’d have a crack 

 if so, make sure that is working--lift the cowl off, ignition on, lookj for a plunger or solenoid to operate. if it's not priming, it will take a lot of tries to get enough fuel in to start it when cold. That lever you lift upo on the control box is just a fast idle, not a choke. The push-in primer takes the place of a choke.

 If its anything like my control box, the skipper would need to push in the key 3 times to prime, then start the motor.

As stated, I had similiar issues to superfish's mate.  Ended up being fouled plugs.  One other thing, stick to Champion brand plugs if you use older model OMC 2strokes.  Have experienced better starting and idling, compared to when I had NGK plugs.

If ya plugs are any older than 6 months change for new $27...hold key in / push and hold for 5 seconds on cold start, I hardly bother with choke when doing this.

Check fuel lines and manual hand primer...should be going hard after few pumps.

I would be worried about the alarm coming on. I think there's a no oil alarm sensor on the VRO pump. You might be getting air in your fuel or oil lines, or possibly the VRO pump is on it's way out.

I used to have a 1985 90hp v4 VRO engine and it had the VRO system disconnected and we just premixed the oil at 50:1. Never had any problems running it like that.

 I have passed on you thoughts to the skipper and he is very thankfull for your input. I will report back if thier is a carton owing to anyone. 

Regards Greg

Skipper has ordered the Manual from local library but hasnt turned up yet. I have been out with him serveral times and always the same thing when we try to start first up. Upsets the skippper a bit and then then motor runs like swiss watch all day. I agree the great guys and like minded guys on this site are gold. I will let you know if he needs the service manual but hopfully will get one from the library and we can sort this annoying problem.

Thanks again Ashen