Hi Team.
Decided to have a look at my 1989 Johnson 110 HP - take head off and laugh at all the salt build up since 1989.
Yes, paint was still on the head bolts - i.e.not taken off..
Anyway, should I clean tops of the pistons while head is off?
If so, best recoommned method?
Thanks
A can of Power tune or Engine tuner (similar product put out by each manufacturer) is good for cleaning carbs, crankcases and pistons, ring lands etc etc
Don't forget to resurface the heads before fitting them back and of course new head gaskets.
Cheers
1989! And about time too? Only about 7 years overdue!
Regards, Kerry.
Good evening BM
hi Kez
Carby clean is pretty good at melting the carbon off aswell.
But lube the bore and turn the motor over after, if you don't you will get surface rust in a fairly short time, not a good thing.
A marriage licence should be like your fishing licence!
Expires every year and you get a 3 day pass when you go interstate.
Hi guys.
I bought this rig back in Jan this year and has been in storage for last 10 months.
This is why it has not attended to it yet..
Question - the pistons are not actually out - I have just taken head off for it's clean...
Do i need totake out pistons for clean?
Can i not just clean tops whilst they sit in there?
Hints of how to move (crank) the pistons?
Smelly
How do I re-surface the piston heads?
Is there a spec?
What do I use?
what do i bore the cylinder with?
all jobs for a pro smelly
cheers
blaze
Smelly, if your not taking the pistons out you can't bore the cylinder, But I think you mean hone, that is take the polish of the bore. But no point doing that unless you put in new rings. So dont worry about the hone unless you see some deep scratches in the bore.
There be a nut at the top of the fly wheel, what the starter motor engages too. Stick a spanner on that that will turn the motor over.
Yeah you can clean the tops of the pistons just sittin there. Is there a carbon ridge at the very top of the bore? that be the carbon you really need to remove that lip. Otherwise the rings have no where to go there hitting a dead stop, that must be removed.
A marriage licence should be like your fishing licence!
Expires every year and you get a 3 day pass when you go interstate.
What instrument do I use to clean carbon off piston heads?
Sorry, I did not mean to say 'bore' - I meant 'lube'.
What do I lube the cylinder with?
Two stroke oil is good, bit of a smear of that and run the piston up and down by turning the fly wheel with a spanner.
Have fun.
A marriage licence should be like your fishing licence!
Expires every year and you get a 3 day pass when you go interstate.
What instrument do I use to clean carbon off piston heads?
Why's that Kerry??Originally Posted by Kerry
1989! And about time too? Only about 7 years overdue!
Regards, Kerry.
Good evening BM
Smelly,
The Power tune makes the carbon come away from the piston crowns. Also a wire brush is good for stubborn carbon.
To resurface the heads you need a nice flat surface such as a thick piece of glass or a flat thich piece of timber. Tape a sheet of emery cloth on it and work the heads back and forth till its polished clean all the way around.
Some people get outboard heads machined but you are asking for trouble ding that. Machine shops can get it wrong and will generally take too much off which is why the emery cloth is the best.
Also, with the heads off you will be able to crank the engine over with your hand on the flywheel quite easily.
Cheers
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