Cooling System Warning Alarm

[Smelly]

Chimo.

You stated.
"Presumably the bores of the grommets have the nice dimpled surface to get water flow happening past them? "

The grommets do not have dimpeld surfce ID. Is the dimpled grommet standard with OMC?

[Chimo]

Smelly

Did we establish that your thermostats are held in place in the grommets by a spring and that the thermostats have a tapered shape (like a cooking funnel) that goes into the grommets?

Chimo

[Smelly]

yes

[Smelly]

still cant bend those impellor vanes..

anyone ideas?

[blaze]

plenty of rubber grease, hold the pressure of the top of the pump onto the impellor and turn the shaft and the impellor will wind itself into the housing.
cheers
blaze

[Roughasguts]

Smelly if your still having trouble with blaze's method, pretty much the standard method of doing it.

Take the impellor off and, wrap some electrical tape around the vaves to bend them over and hold them tight.

Place the impellor in the housing and cut the tape, turn the shaft as you pull the tape out.

[Smelly]

HTnaks guys.

DOne!

QUite easy after you knwo that trick...

New water pump kit now in place!

Next - put leg back on and then re-install thermostat assy...

Stay tuned..

[Smelly]

OK.

Bottom leg now back on wiht new water pump kit.

Question - the two large phiilips head screws and 15mm bolt (in center) of trim tab do nto want to tighten up. Can someone please explain this one and why it may be so..

I have checked threads - not stripped.

THoughts?

[Roughasguts]

Maybe you got the wrong bolts, they might be too long.

that is if You can start the thread right.

[FNQCairns]

Smelly as an offside don't feel to bad about the problems you have been having.
Today I started to pull a 90hp yam leg apart so I could give it a full reseal and pump kit as I dont trust it's history. These unit's (I found out today) have a real dodgee brothers driveshaft seal carrier design it relies on a touch fit with a few sq inches of surface area against the leg casing proper - result broken carrier stuck in leg - true outboard corrosion horror story!
Not if it happens, WHEN it happens >

Yamaha needs their heads thwacked for this design! on an engine leg that gets submerged in salt water, I checked and all the current 3-4-6cyl use more or less the same design.

Be warned anyone with these engines at the 5 year old mark consider getting the driveshaft seals (only) changed out or just the carrier removed cleaned lubed and replaced with the old seals at the next impeller replacement for piece of mind, if your engine is around 10 years old, possibly too late- forget it, drive it until it chews water or pay for a near full teardown to replace just these 2 seals.

The above is actually a spit!

cheers fnq

[dogsbody]

Credit where it is due. You are one tenacious bloke i would have taken a hatchet to this job a long time ago. Keep up the good work fellas it's good to see you guys giving Smelly the time. Kudos to you all.

Dave.

[Roughasguts]

Okay smelly where the hell are you ? out fishing with it I hope.

Hope you didn't go out to the reef just yet, think you might be better off keeping in close for a few trips.

[Smelly]

Hi boys..time is 11pm Sat..

Doing the XMAS family visit barbecue thing....

Family off to bed - it's time for me to reek havoc agin...I hope to go through night again tonight and finish the stat assy re-install..

But first, these screws and bolts in trim tab...the screws were not even removed - just loosened and obviuosly the bolt had to come out - but all three(3) are correct ..

Seems srange that the thread in all three fasteners will not catch..

Guts - woudl u like me to repair your Yami instead..? Good luck!

[BaysideMarine]

Screws??? They are not original... Is there a foil fitted??

Trim tab is held in place by a single recessed bolt in the centre.

[Smelly]

I'll take pic.

it is the circular plate with numbers on it..