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View Full Version : Indmar LY6 Starting Question


sraab928
07-31-2012, 07:45 AM
Good Morning all - I am in the process of purchasing (under contract) a 2008 Mastercraft CSX 220 SS with an Indmar LY6 400hp engine. My question is this - when you first start the engine cold (not when its warm) the rpms go up and down (not sure of the range but its quite noticeable) for the first 15-30 seconds or so. I am told its the fly by wire controls setting themselves up. Since I have never owned a boat with this type of control I am curious if this statement is accurate. I searched the forum and couldnt find anything. I also looked over the Indmar manual on line and found nothing about it either.

I just want to make sure this is true before taking delivery.

Thank you in advance
Scott

CantRepeat
07-31-2012, 07:56 AM
Good Morning all - I am in the process of purchasing (under contract) a 2008 Mastercraft CSX 220 SS with an Indmar LY6 400hp engine. My question is this - when you first start the engine cold (not when its warm) the rpms go up and down (not sure of the range but its quite noticeable) for the first 15-30 seconds or so. I am told its the fly by wire controls setting themselves up. Since I have never owned a boat with this type of control I am curious if this statement is accurate. I searched the forum and couldnt find anything. I also looked over the Indmar manual on line and found nothing about it either.

I just want to make sure this is true before taking delivery.

Thank you in advance
Scott

I've never seen this as the default behavior in a throttle by wire system. Maybe Jim or EngineNut will have an idea as to why it is happening.

mckevin
07-31-2012, 08:54 AM
Might be ok... but mine doesn't do that at all.

sraab928
07-31-2012, 09:13 AM
It seemed like odd behavoir - the boat had been sitting - when we first started it - it would surge up and down for a short period than settled down. Upon warm restart it didnt happen. Now I have only witnessed the cold start once - I was told it was normal (because of the fly by wire) - but I really wanted to check it out before signing the final check as I cannot find anything about this online.

CantRepeat
07-31-2012, 09:21 AM
It seemed like odd behavoir - the boat had been sitting - when we first started it - it would surge up and down for a short period than settled down. Upon warm restart it didnt happen. Now I have only witnessed the cold start once - I was told it was normal (because of the fly by wire) - but I really wanted to check it out before signing the final check as I cannot find anything about this online.

Who told you it was normal?

sraab928
07-31-2012, 09:29 AM
The dealer.

sraab928
07-31-2012, 09:35 AM
I just called my local Mastercraft dealer (not the one selling the boat) and spoke to a service tech there who said that it is normal behavior for that motor. Not so sure why I didnt think to do that first.

Ironhorse
07-31-2012, 11:54 AM
Mine has always done this and it is only for about 15 to 20 seconds as you mentioned. It has never caused any other issues and my dealer said this was normal as well.

scott023
07-31-2012, 12:02 PM
I just called my dealer and they also said that is normal for the LY6.

sraab928
07-31-2012, 12:12 PM
Thanks guys - I feel much better now. I will post pictures of the boat when I get it home!

CantRepeat
07-31-2012, 01:00 PM
So it's normal for an LY6 but surely not normal based on throttle by wire.

scott023
07-31-2012, 01:03 PM
So it's normal for an LY6 but surely not normal based on throttle by wire.

That's right. Dealer said the MCX and L18 don't have that characteristic.

sraab928
07-31-2012, 06:10 PM
So I guess wrong explanation from the purchasing dealer but still the engine behavior is ok - Its good to know if anyone else is looking at one of these.