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 11 
 on: February 14, 2019, 02:58:05 PM 
Started by austral - Last post by Chair
Hi and welcome Darryl
I did my 64 Merc and stripped the head back to metal but not the lower section. I painted the head with two pack and it came up beautifully and lasted for years
The lower section I just rubbed back and used single pack enamel. It was never as good as the stripped section.
Preparation is always the key. I suppose sand blasting would be quicker as it took a lot of stripping
These are my thoughts but others may have better ideas. Canít remember the paint brand I used.
David

 12 
 on: February 14, 2019, 12:56:03 PM 
Started by austral - Last post by austral
Hi all, yeah im new here. Ive got a very low hrs, fresh water only '62 Merk 700. It runs like a swiss watch after carb clean out etc.
I've decided to paint the "cloud white" exterior and buff up the shiny bits , so can i paint strip the alloy cowl and leg etc or do i just rub it back or even get it blasted ? I just havent done an outboard before.
While im at it, what paint do you guys recomend ?
             Cheers, Darryl.

 13 
 on: February 13, 2019, 12:23:09 PM 
Started by antman - Last post by Mark S
I've read everything and you've gone around in one big circle. Need to start from basics again. Mercman's point about mis-matches needs to be kept in mind, it may or may not be contributing to the problem.

Have you checked number one cylinder piston top dead centre to see if it matches the TDC on the label before checking ignition timing? Timing should be checked at max advance which is 32 degrees for a 1967 model. Can be checked at any revs or static.

Don't let a clean spark plug on the bottom cylinder mislead you either, some in-line Mercury's do that.

If you had a houseboat prop on it, it would be revving its head off and getting no-where, not loading up.

Obviously you are using a good brand of fuel like BP and a quality 2 stroke oil like Mercury premium plus or Evinrude XD30.

I would think a 15 pitch prop is not too big, your gearbox should be a 2.1-1 ratio.

When under full load, have you had anyone squirt some fuel in to the carburetors to check for fuel starvation?

Can you post a photo of the spark plugs, so Mercman and I can see them.

Mark S.

 14 
 on: February 13, 2019, 09:06:51 AM 
Started by antman - Last post by MERCMAN
The loom in your most recent picture doesn't look real flash. It shouldn't look limp like that (near the support bracket).
Take the electrical tape off and look for perished/damaged insulation of the wires within the loom.
Can you borrow another control box and loom assembly from someone? (I had spare control boxes up until this time last year.) Try speaking to Guy at the Outboard Workshop - Carrum Downs. I sold most of my collection to him.


This is an obvious one... is the vent on the fuel tank open, since attending to all the other suspects?

The other thing I see in the pic.. That's not a 1967 outer. This leads me to think the position of timing mark (decal) is probably not matched to your powerhead. This needs further investigation, only if there is nothing wrong with the wiring within the loom. 

MERCMAN.
 
 

 15 
 on: February 12, 2019, 07:49:20 PM 
Started by antman - Last post by austral
Water leaking around spark plugs and shorting them out ?

 16 
 on: February 10, 2019, 12:44:02 PM 
Started by antman - Last post by antman
Hi . great thinking and good theory s
but being the fact that i have video of this engine wot and up on a plane ,3 minutes before it stopped
it coughed a bit ran a bit and coughed and died .  which we have found out to be the flywheel spinning and shearing the key. no start again
and i dont think it sheared the key due to a sudden lock up stop !i died slowly so i asume it was due to incorrect torque setting on flywheel nut .not tight enough
and the guy i bought it off ran it in this configuration before me . with this prop ...he did admit that i didnt go as hrd as it did after i tinkered and lubed the dizzy magnito thing ( 1 st post )
so ill push reset ( wish there was one ).and go back to the start .chapter 1 page 1 and with a fresh head
 check voltages . sparks . can now check timing in gear at idle  ( im suspecting timing still  rememering 2 mechanics have both suspected timimg )
i l do a link and sink  checking that
mercaman thanks for your input ..
im working on a 4-6 deg atdc idle  38deg ithink wot
but other ignition setting for like wise engines seem to be all btdc?
the plugs firing before it reached tdc  understanding it advances as the revs increase to pre anticipate the the next time to fire
but still weird some are before .and a few are after ..or am i wrong and my timng settings are wrong
and sorry mercman there is no showcase or mercedes benz after this quiz if you win , but i will sell you my 1969 280s ( 2 50 year old headaches that both start with m)


 17 
 on: February 10, 2019, 12:05:56 PM 
Started by antman - Last post by antman
made a tank

 18 
 on: February 08, 2019, 08:39:06 PM 
Started by Chair - Last post by Chair
Seems how this has eventuated A

 19 
 on: February 07, 2019, 05:19:02 PM 
Started by Chair - Last post by austral
So what ever happened with Hans ?

 20 
 on: February 07, 2019, 06:54:12 AM 
Started by antman - Last post by austral
Are you 100% sure you are getting full throttle ? The fact its been swapped and changed, it may not be adjusted right.

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