Flushing out

[benbaron]

Sorry to keep posting but Im full of questions....

When flushing out, is there a best rpm? how long to run the engine for and also does it need to get to operating temperature to open any thermostats?

Cheers
Ben

[jokaboat]

Not too high revs, maybe 1500, and yes you need to get up to operating temp to fully flush through. Flush for a few minutes after that.

[benbaron]

Not too high revs, maybe 1500, and yes you need to get up to operating temp to fully flush through. Flush for a few minutes after that.

Operating temp is what 175f?

[Brit Rider]

Flushing 101:

1. Boat should be at operating temp otherwise the water won't be flushing through properly. This might mean flushing for a longer period.

2. No need to rev the engine. Idle speed is fine.

3. Run for a minimum of 5 mins. I like to taste the water coming out the back to check for salt.

4. Always keep a close eye on the temp gauge, it should not rise out of the normal operating temp (around 175f for most gas inboards)

5. keep an eye on the muffs... They can move/be knocked off during flushing!

6. I've seen some drain their engines after flushing... Worst thing you can do as this will actually speed up corrosion! Keep her full of nice clean water and you should be fine until winter time (When you'll want to run some antifreeze through)

Hope that helps,

Mike
Maven Marine

[benbaron]

thanks guys thats great

[Capn Jack]

Agree with JB & BR, but would add....

10mins min.

Operating temp will be when the thermostats open usually when water comes out of the transom holes and not just the prop, should be reached after approx 2-3mins, gauge will stop moving some are 160f most are 180f.

Lastly, tap flow not too strong, just a couple of turns, enough to not have water gushing past the muffs whilst the engine is running. Also, don't start until you turn the tap on, obvious I know but essential.

[ian h]

And also remember to have the leg in the lowered position "NOT" the trailer position or you will wear the UJ out prematurely or worse damage it .
for safety make sure no children are near the leg when flushing. As water is warm and secondally just incase the prob moves. Always make sure engine is in neutral

[NikTheGeek]

Or go to B&Q and buy a header tank for £20 and fit a tap to the bottom of it. Fill it with water and lower your leg in to it and run it in there - with the hose still filling it to keep it topped up for any water loss. When your done, open the tap to let the water all drain out then chuck it in the garage with all your gear in it - makes a great storage tub.

The big benefit (besides your muffs falling off) is that your neighbours won't complain coz it'll be 100 times quieter!!!