Running in procedure - Clamshell

[9D280]

Sometime soon I will need to run in the rebuilt engine. Having had a trawl round the net, I have found a few slightly contradictory rumnning in procedures, all dated pre 1975.

So, Does anyone have a copy of the 1987(ish) book of words for a clamshell and if so could you let me know the running in procedure? I ask for 1987 as the engine now has the newer two ring pistons & no pooppet / thermostat as per the last gen of production, but any modern-ish one will be better than what I don't have at the moment.

Maybe one for the Merc 'techs - as the crank has a few(!) hours already under it;s belt & I'm just running the new pistons / bores in, does that make a difference to the running in procedure?

Thanks in advance......

[uncle al]

Thanks for the good wishs please see below
log onto www.brunswickmarinemea.com
scroll down to the btm and in the middle you will see download centre
click on down load centre
the screen will change, just under the brunswick europe, middle-east and africa banner you will see another download centre, click on that one
you now have amenu of nine items the one you want is operation and maintenace manual click on that one,
go to all and click on the drop down box and click on outboard,
click on all again and you will see a lot of years
click on 1991 a slightly later version of your obm but running in is the same, or try some of the other yearsand see what you can find
click onto the drop box again and click on mariner
then press launch
i hope this is a help have a merry christmas and a happy new safe and prosperose new year
regards
uncle al

[9D280]

Al,

Thanks for the pointer, unfortunately it has almost every horsepower bar 50/60! I looked at every date back to 1975, but no 50 /60 / 500 / 600 / 650. (Mind you even ifd they were there, the 500/600/650 would be the ones I found already with the 3 ring pistons etc)

[jwalker]

Give it extra oil and run it softly for a few hours varying the revs. Increase revs a little each time you're out and build it up to max gradually and it'll be good.
There is a train of thought that you should drive it hard initially to scour the rings into the bores but that's a quick power thing not a longevity thing.

[davej]

I have this very engine, a 1987 60hp that I have removed the autoblend and while I have the manual somewhere think the running in procedure is:

2 tanks ( ie 50ltrs) of 25:1 oil mix

vary the throttle with the first tank and with the second brief blips up to full throttle.

Never lug the motor

Good luck

I think my 60hp merc is a bril motor and at the moment wouldn't want anything else. Its light, quick and simple and for the amount of use it gets the highish fuel comsumption is neither here or there. Its a bit smokey but with modern oil quite acceptable.

Davej

[T 15]

sorry a wee bit late.........

from early / mid / late 70s operation manuals for the 650 3cyl, ( also for the 500 650, & 800 4 cyl & 402) its says to use double oil in the first two ( 5 gal ) tanks & operare a new motor a 1/2 throttle ( 2500 > 3500 rpm ) for 2 hours, after 2 hours the motor may run at any speed, although sustained operation at full throttle should be avoided for an addition 8 hours use.

[9D280]

Guys,

Thanks for your combined input. Looks like I stand half a chance of escaping the smoke screeen a bit earlier than I thought!