What cause this 2.4 to grenade?

**gmacrae** · 10-23-2020, 04:08 PM

Well, the day has finally come when my old 2.4 laser **** the bed... Was running great across the lake at about 6k rpm, lost a bit of power for about 2 seconds, got real loud for about another 2 seconds then seized...

What do you reckon caused it? Does it look to you like the whole motor's been lean? Wasn't any piston dust on the #5 spark plug, looks like bearing cage material in the that rubbish tho?

Looking for a good powerhead in north island NZ if any of you are down this way!

Cheers

Gene

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**Capt.Insane-o** · 10-23-2020, 05:36 PM

Injector failure

**gmacrae** · 10-23-2020, 06:31 PM

Originally Posted by Capt.Insane-o

Injector failure

Hmm, probably pretty likely I guess

**mercrazy** · 10-23-2020, 06:53 PM

regular gas?
double firing switchbox?
lean?
timing too high?

**90 5.0** · 10-23-2020, 07:28 PM

Originally Posted by Capt.Insane-o

Injector failure

Or injector driver in the ecu. I had one do that and sounded exacrl as he described.

**gmacrae** · 10-23-2020, 07:46 PM

I have wondered about the quality of the "98" gas at the station I've been using lately, could have got a bad batch I guess... Switchboxes are only a couple years old but ya never know. I haven't touched the mixture or timing in the last couple years.

It's got a brucato ACU so don't imagine it's the cause - it'll go back to brucato for a checkup before being re-used/sold so we'll see

**gmacrae** · 10-25-2020, 01:49 PM

Has anyone got any feedback on this mariner 2.5 150 EFI? it's a '99 apparently... would it actually be a bit lazy/sluggish compared to my old 220 laser or probably not given the much newer generation etc? Thanks for any advice

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**Merc 2.5** · 10-25-2020, 04:55 PM

I hear the 220 laser ran pretty gud. Don't really c a 150 runnin with it but the 2.5 b easier to mod with steel sleeves

**gmacrae** · 10-26-2020, 02:46 AM

Originally Posted by Merc 2.5

I hear the 220 laser ran pretty gud. Don't really c a 150 runnin with it but the 2.5 b easier to mod with steel sleeves

Cheers, think I'll keep an eye out for a 2.5 200 then

**Steve Pope** · 10-26-2020, 04:10 AM

I have a 2.4 200 block. It needs 1 cylinder sleeved( I have the sleeve) I also have rods and pistons. Im in Cromwell

**gmacrae** · 10-27-2020, 06:12 PM

Originally Posted by Steve Pope

I have a 2.4 200 block. It needs 1 cylinder sleeved( I have the sleeve) I also have rods and pistons. Im in Cromwell

Cheers Steve, I'm really wanting to get myself a complete 2.5 that'll basically bolt on though (will do reeds, premix, usual stuff of course)

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