Well She Works!

[GregH]

well this arrived for me yesterday. Even though it's <whispered> near the end of the season here</whispered> I'm going to try and install it this weekend. Just have to track down a 1/8 NPT Tee locally.

[thatch]

Vacuum Gauge notes

A vacuum gauge is a great tool for doing several things. First, it will help you find the most economic cruising speed. This is normally where you have come close to hull speed with the rpms in the 1800 to 2000 range, with the gauge still showing a relatively high vacuum reading. Obviously this can be a great help in finding the right prop for your boat. It can also serve as a "tell-tale" about the condition of your boat's bottom and when its time to do some cleaning. Don't be surprised if the needle tends to bounce at idle, it's just the gauge trying to read each cylinder individually. There are ways around this bounce but it's not really necessary to try to fix it.
Tom

[GregH]

Attempt #2

The bypass I put in recently was from the Atomic 4 sitting in the garage at home waiting to be rebuilt. Problem was (for me) the valve on it was an old "gate valve" and it was tough to know how much was closed off etc. So last night re-plumbed with ball valve.

Soooo much nicer.

Now for a weekend of light air sailing huzzah!



by the by - the pic was taken just after I installed it... I know the valve is set to full bypass

AND ... the thermostat is most definitely out...

[GregH]

So I've been running the new bypass about 50% closed and on avg cruising about 20-30 minutes. From reading this isn't enough to get the engine fully warmed up.

The temp gauge is working but it hasn't moved from the lowest 120F point. Water temp in lake Ontario is about 13-18C.

Keep closing down bit by bit until I see temp react I am assuming is the next step? I don't like the idea of running it too cold either.

[Peter]

Greg,

The bypass controls how much coolant flows through the block versus how much goes straight up to the t-stat housing.

Closing the bypass forces all coolant through the block - hence the engine runs cooler.

Opening the bypass reduces block coolant flow by allowing some flow to go straight the the t-stat housing - hence the engine runs warmer.

So, opening up bit by bit until you see temp react is the next step.

Hope that helps,

Peter

[GregH]

Greg,

...
Closing the bypass forces all coolant through the block - hence the engine runs cooler.

...

Peter

Yes of course.. closing would force more water through the block.. silly me.

That's what I get for rushing my message this morning! LOL..

thanks for setting me straight,

[GregH]

Just a quick update - the Indigo Prop (and crankcase system) has finally been ordered. Now for Spring!

[GregH]

And it's here in all it's glory, along with the PCV kit.