Perkins 4.154 mixing elbow blocked

[Wotname]

Originally Posted by GILow

........
Any suggestions? I am tempted to drill straight through into the exhaust stream and bypass what looks to be some kind of Venturi style mixing passage.

Over to the brains trust…Attachment 252417

Good bet the 'Venturi' is simply a good hard build up of calcium carbonate and rust. These builds are often concentric in nature and is more constricted at the hottest point.

FWIW, I have found the longer they are left in place, the harder they become and can be come surprisingly difficult to drill.

Good luck with the next 60 miles. Is it the final 60 miles or just the distance to the next port

[more]

good luck.
what is your speed now 5 kt or more what rpm

[more]

i forget. you must watch exhaust if coming steam from exhaust this is sign overheat, slow down. check temperature every hour to rubber hose if over 100°C danger slows down.

[GILow]

Originally Posted by more

i forget. you must watch exhaust if coming steam from exhaust this is sign overheat, slow down. check temperature every hour to rubber hose if over 100°C danger slows down.

Thank you, good thinking. I will do this.

[GILow]

Originally Posted by more

good luck.

what is your speed now 5 kt or more what rpm

3.6 knots a steady headwind blowing at 10 knots.

Tachometer does not work but it feels like about 1100 rpm.

Temperature steady on 140, I will wait another hour and if the temperature has not moved I will add 100 rpm.

[more]

Originally Posted by GILow

3.6 knots a steady headwind blowing at 10 knots.

Tachometer does not work but it feels like about 1100 rpm.

Temperature steady on 140, I will wait another hour and if the temperature has not moved I will add 100 rpm.

140°C or Fahrenheit

[more]

normal working temperature is 185-200℉

[kmacdonald]

Originally Posted by GILow

3.6 knots a steady headwind blowing at 10 knots.

Tachometer does not work but it feels like about 1100 rpm.

Temperature steady on 140, I will wait another hour and if the temperature has not moved I will add 100 rpm.

Someone must have removed the thermostat if it's that cool. (Assuming 140 degrees F)
Might have done so to try and prevent overheating. What a CF.

[adjo]

It might also be good to ensure that those rubber (?) pipes are not so close (touching?) the exhaust.
Especially with the risk of overheating.

Have a good sail and safe delivery.

[GILow]

We gave up and turned back.

Temperature just kept slowly climbing.

We’ve had a lovely run back under asymmetrical so can’t really complain, the boat sails very well with the right bits of cloth.

I am thinking I’ll leave that elbow in place and simply drill and tap in a stainless hose barb for now. Access to tools down here would be problematic and getting the elbow off would most likely destroy it.

[GILow]

Originally Posted by adjo

It might also be good to ensure that those rubber (?) pipes are not so close (touching?) the exhaust.

Especially with the risk of overheating.



Have a good sail and safe delivery.

Yes, I’ve actually removed the one that was cable tied to the elbow!? What the…?

[Wotname]

Originally Posted by GILow

We gave up and turned back.

Temperature just kept slowly climbing.

We’ve had a lovely run back under asymmetrical so can’t really complain, the boat sails very well with the right bits of cloth.

I am thinking I’ll leave that elbow in place and simply drill and tap in a stainless hose barb for now. Access to tools down here would be problematic and getting the elbow off would most likely destroy it.

Hope you get it sorted without too much drama!

[GILow]

Originally Posted by Wotname

Hope you get it sorted without too much drama!

I'm thinking...

Would it be easier and smarter simply to drill a hole and poke a bit of pipe through then glue it in place with one of those metal glues?

I suspect the elbow might be cast iron? I've never tried to tap a thread in cast iron, I feel like it might be difficult?

[GILow]

It's tough, this boating life...

[Uncle Bob]

Originally Posted by GILow

It's tough, this boating life...Attachment 252463Attachment 252464

Yeah but somebody has to do it.