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Old 04-08-2004, 05:52 PM
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Location: New Zealand , Reflex Chia
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Default Mercury Saltwater 90 hp ELPTO

My new boat has a Saltwater Mercury 90hp ELPTO outboard . A workmate of mine has the same engine on his boat . He mentioned to me, have you noticed the engine drops to two cylinders at trawling speed .
To be quite honest , I haven't noticed this feature on my engine at all ( maybe it does ? is it suppose to ? ).
If my engine is cutting down to two cylinders at trawling speed it is virtually undetectable .
The engine is very economical and has power at the fingertips when need ( very good so far ) .


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Old 04-08-2004, 06:38 PM
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Default RE: Mercury Saltwater 90 hp ELPTO

From 0 to 1800 RPMs they run on two cyls.
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Old 04-08-2004, 06:48 PM
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Default RE: Mercury Saltwater 90 hp ELPTO

Guys, that's incorrect. Only the 115 and 125's drop two cylinders. The 3 cylinder 90 -- as an in-line 3 cylinder -- runs on all three all the time! The 115 and 125's are 4 cylinder o/b's, and drop two at the idle circuit.

By nature, the 90 runs a bit rough under 1200, but as a part-time tech, I can assure you that these are some of the finest running, most reliable motors out there.

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Old 04-08-2004, 07:01 PM
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Default RE: Mercury Saltwater 90 hp ELPTO

My mate also told me that he's running leaded 96 octance fuel in his engine .
I told him that unleaded 91 octane is the fuel he's suppose to be running ( probably why he think the engine drops down to two cylinders at trawling speed ) .



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Old 04-08-2004, 10:22 PM
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Default RE: Mercury Saltwater 90 hp ELPTO

I was told not to but I used to run 98 octane with my 3cyl 40 2-stroke, man the power difference was superb and always idled smooth and power response was excellent. Not quite sure what the engine would be like quite a few hunded hours on, no longer have it.
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Old 04-09-2004, 07:18 AM
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Default RE: Mercury Saltwater 90 hp ELPTO

I had a 125 Mercury ELPTO and it did run on two cylinders until about 1800 RPM. I am just curious as to how the two cylinders that were not firing got lubricated? I have since traded it in for a new boat but it ran like a dream and never let me down once.

Mark
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