zoidberg
Well-Known Member
On a new Beta engine....
Recommended by Beta. Worth the cost/bother..? That's £164....
Recommended by Beta. Worth the cost/bother..? That's £164....
High-rise exhaust elbow
- Thread starter zoidberg
- Start date
VicS
Well-Known Member
I believe it is recommended if the exhaust elbow outlet is less than about 9 inches above the inlet to the waterlock.
macd
Well-Known Member
Roughly, yes.
Beta's installation instructions state this:
The important dimension that must be measured is from the normal ‘static’ sea level to the point at where the cooling water is injected into the exhaust - this should be a minimum of 25 cms. If this can not be achieved the following options must be taken (see 11, 12 and 13).
11, 12, and 13 detail waterlocks, goosenecks, anti-siphons and high-rise exhaust bends.
The instructions go on to say that the level of the watelock inlet is less than a height 'H' below the level injection point, a high-rise elbow should be fitted. 'H' is 30cm for an elbow-to-waterlock hose length of 30cm, 40 cm for a 120cm hose.
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Kwik Decision
Well-Known Member
On the Beta 25, and I assume their other engines, the standard exhaust outlet is to port. The high rise exhaust moves the outlet over to starboard, so if your current exhaust is to starboard (and in good condition, of the correct size etc) the high rise is a convenient way to continue using it.
BabaYaga
Well-Known Member
The normal high riser, which I have, does not alter the side of the outlet. But I think there is a version that does this.
To the OP: I think the extra cost is money well spent if there is any doubt about being able to place the water trap low enough. Water entering the engine from the exhaust system is a common cause for large engine repair bills.
Steve_N
Well-Known Member
Indeed, it's referred to by Beta as the 'high rise cross-over exhaust elbow' although I've heard it called the 'Volvo cross-over' too.
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nigelm
Well-Known Member
I had one fitted to my new 20hp , wasn't ordered with one but once fitter started and taking measurements he recommended I have one so the little extra wasn't worth quibbling over and all done to spec .
