Just purchased 6hp Merc - maintenance and carby upgrade question

[Red_Nut]

Afternoon Team,
I have just picked up a 2003 Mercury 6hp , with the intention of also picking up a v-nose punt to complete the car-topper setup.

My questions are as follows:
1 - Maintenance
The motor has been sitting in a shed for a while. My initial thoughts are new spark plugs and leg oil. Apparently it has had minimal use, so I was not contemplating changing the impellor.

Is this enough? It runs sweet and pumps heaps of water out of the tell-tale.

2 - Carby Upgrade
I have heard a lot about upgrading the carby to help the little 6hp get along a bit better? Something about changing over the carby with one from an 8hp?

Is this correct or am I on the wrong track?

On a side note - if anyone has an old v-nose or std punt laying around drop me a line.

Your informaed comments are apppreciated.

Cheers.

Ed.

[STUIE63]

Red Nut i would be changeing the impellor as well if it has been sitting in a shed awhile .If you wanted an 8 horse why not buy one instead of a 6. My experiences with changing carbies is fuel economy is shocking and not much gain.Maybe merc 6 and 8 this is the only change i have no experience with mercs
Stuie

[Noelm]

this upgrade thing pops up all the time, all you will achieve is a poor running, bad performing motor, there is more to a different motor than just the carby or the jets, it may share a similar power head/block but it stops there (usually) manufacturers would be fried alive if they charged (say) $500 or more for the next HP up if all the difference was a different jet in the carby (at manufacture probably about 20 cents)

[FNQCairns]

Red nut try a search back a couple of months think this was covered, from memory it was a merc also, has links!.

cheers fnq

[fishingjew]

this upgrade thing pops up all the time, all you will achieve is a poor running, bad performing motor, there is more to a different motor than just the carby or the jets, it may share a similar power head/block but it stops there (usually) manufacturers would be fried alive if they charged (say) $500 or more for the next HP up if all the difference was a different jet in the carby (at manufacture probably about 20 cents)

Shhhh but thats what there doing $200 for new carby 6 now an 8

[Red_Nut]

FNQ - Thanks for that. I'll do a more detailed search this time.

Cheers.

Ed.

[Blackened]

G'day

I asked this question regarding a 9.9 and a 15merc 2000 model, 2stroke.

I am wanting to upgrade, have spoken to about 1/2 dozen different mechanics and have checked all part numbers and everything else possible.

For this particular setuop, I will need to change the carburettor (bigger throat) and also the megaphone (tuned further). I will also need to advance the timing by 1 degree.

I do believe the 6 and 8 are the same, best off ringing the mechanic and cross referencing the parts.

Be careful of the reeds aswell, in my case, they are the same.

Dave

[fishingjew]

2 - Carby Upgrade
I have heard a lot about upgrading the carby to help the little 6hp get along a bit better? Something about changing over the carby with one from an 8hp?

Is this correct or am I on the wrong track?

The only difference is the carby bigger throat and jet size

A new one 8 hp cost me $160 plus $35 fitted and tuned

The difference 10 foot tinnie 12 knots to 17knots.