Mercury Throttle Assembly

Hightower · 25 June 2005, 21:03

Any of you guys got any tips on tweeks to a Mercury throttle assembly, mines been a little fickle the last couple of trips and I want to strip and lubricate.

Andy

Wayne Rogers · 25 June 2005, 23:28

I had a problem with mine,very stiff,awkward getting into gear.I removed the side casing and sprayed loads of WD40 into it.Now it's the smoothest throttle control box I've ever had.I did that 3 months ago and it's still going strong.

Swifty · 27 June 2005, 20:37

Over the winter I stripped every last bit out and cleaned it up with petrol and an intensive programme through the dishwasher. (wife was not pleased AT ALL), Then sprayed up the outside and greased all its bits and pieces. Box is fine but I should do the cables now.

Tim'mers.

Hightower · 28 June 2005, 01:32

Cables!!!......Dishwasher!!!

Not sure that my dishwasher would do that!

Thanks guys. I'll have to strip it this week and have a look, is there anything better than WD40? What recommended grease should I use?

Andy

Swifty · 28 June 2005, 08:07

The Mercury stuff is pretty good, shit n blanket stuff and its water proof. Waterproof bearing grease may do it but theres alot of nylon bushes inside a control unit. Not sure how well it will perform there.

ATB.
Tim'mers.

Hightower · 30 June 2005, 18:31

Update: Apears that the control box is OK and fully working and cables aren't caught up any where.

The problem seems to be at the throttle linkage cam and it looks as though the roller bracket is slightly bent, indicating that some excess force has been present (18.5 stone of me

).

Can anyone tell me if this is a common problem with the Merc 90 fourstroke?
Andy

Scotty · 30 June 2005, 21:59

Quote:

Originally Posted by Hightower

Thanks guys. I'll have to strip this week and have a look, is there anything better than WD40? What recommended grease should I use?

Andy

I think that I may have stumbled into a masonic lodge meeting

Scotty · 30 June 2005, 22:01

Quote:

Originally Posted by Wayne Rogers

I had a problem with mine,very stiff,awkward getting into gear.I sprayed loads of WD40 into it.Now it's the smoothest I've ever had.I did that 3 months ago and it's still going strong.

Hightower · 30 June 2005, 22:03

Mi Knobs the problem, I've flat spotted it

Louise · 30 June 2005, 22:06

Sounds painful! I think you can get a cream for that from the pharmacy!

Hightower · 30 June 2005, 22:51

Pete 7 told me to cover it in waterproof grease

.

Louise · 30 June 2005, 22:54

Careful about taking advice about knobs from Pete7 - he used to be in the Army you know!

Only joking Pete!

Pete7 · 01 July 2005, 07:22

Louise, you are confusing the Army with the RN

Hightower · 01 July 2005, 19:19

Right, the "tighness" problem now appears to be the throttle linkage that link all of the carbs. I've sprayed everything with WD40 and it has eased up and seems to be operational again.

Questions: Is spraying with WD40 enough to sort the problem long term? Do you think a strip down of the carbs is nessessary to fix the problem? Spring pressure seems high on the linkage, do you think that this could be reduced to allow less force to move the throttle lever on the control box?

Daniel TD5 · 02 July 2005, 21:39

andy

i think you are barking up the wrong tree if the level is stiff its the cable
or as wayne said the box

if you have greased the box its the cables my one were stiff and crap when i got my rib . i had the cables re routed and change to merc ones quick silver
type problem storted apart from it stalled all the time
but fixed that by balancing the carbs and ajusting the idle but i found the linkage very poor with load of play inside the cover can,t see the carb springs makeing the lever stiff

dan

Paul F · 02 July 2005, 22:56

are you sure you havnt got a partial sieze/stiff carb butterfly operating shaft on one of the carbs,cos if cables and box is ok then it could be that
paul

Hightower · 03 July 2005, 01:40

Quote:

Originally Posted by Paul F

are you sure you havnt got a partial sieze/stiff carb butterfly operating shaft on one of the carbs,cos if cables and box is ok then it could be that
paul

Yep, it's definatly in the butterfly operating shaft area. Trouble is I have them working again after spraying with WD40. I don't know which one is the problem and that annoys me! As I like to know exactly what's wrong with things.

The spring pressure is quite high on the operating linkage (one spring/carb...4carbs) do you think I can reduce that a bit?

I guess I'll keep spaying with the WD40 untill the engine is serviced for next season (next year) and then get all the carbs stripped and cleaned.

Mark Halliday · 03 July 2005, 10:01

Andy

WD40 is more a solvent than a lubricant.
Long term you would be better off spraying it with a Silcone/PTFE dry lubricant. Rocol do one or get some Holts Pro Lube from the boat bit shop.
Being a dry lube, stuff will not get trapped in it. (Grit, salt crystals, fluff, feathers or lugworms.)

What time did you lot escape last night?

Hightower · 03 July 2005, 18:15

Quote:

Originally Posted by Mark Halliday

Andy

(Grit, salt crystals, fluff, feathers or lugworms.)

What time did you lot escape last night?

Fluff, feathers and lugworms

We left at 01:00hrs in typical "Churchillian" lights out fashion

Mark Halliday · 04 July 2005, 09:24

Quote:

Originally Posted by Hightower

Fluff, feathers and lugworms

Just thinking of all the stuff you "worm drowners" carry.