super chippin mariner engine

nugent · 06 December 2003, 20:12

weird me finks. have just been told to day, that you can get mariner 135hp and have it chipped to be + on hp as it is the same lump as the 170 motor just mapped out on the management side different,,
i finks some one is full a $*#t ..any clever buggers know other wise.. sounds to good to be true to me...
??

Rogue Wave · 06 December 2003, 23:14

if its the same block then why not

nick wood · 06 December 2003, 23:28

You can have any engine chiped as long as it has electronic fuel managment, people use them in there cars and it gives them more hp, the mariner 135 is efi so im sure you can.

jwalker · 06 December 2003, 23:36

I can see how you can have different fueling and/or ignition timing, but where do you get the extra air from? 35 extra horses is a lot.

nick wood · 06 December 2003, 23:44

not to sure, at a guss a bigger air intake or sumthing like that, but when you use the extra hp you go faster and lets more air in not sure.

nugent · 07 December 2003, 09:04

ye me finks some one is pulling me pisser on this one

cheers for your imput guys! happy RIB-in

ribraff · 07 December 2003, 19:41

Surely it's a case of a different set up on the carb's, ie 75hp and 90hp 2 strokes, same engine but different carb's?

Diesel · 08 December 2003, 12:13

Are you talking about optimax, Efi or four strokes?

nugent · 08 December 2003, 12:37

its an optimax

Diesel · 08 December 2003, 13:29

Well its possible but there is no chips available for the ECM as i know of, as its a sealed unit.
My guess would be that you would have to have the ECM reprogrammed. Why not just by a bigger engine? I dont think the hassle is worth it!.
Although you could try putting a 175hp ECM on a 135 but i dont thinkit would work.
But i think i might try it at work just out of interest!!!

nugent · 08 December 2003, 15:32

go for it m8 and ;let us know,,,

gtflash · 08 December 2003, 20:46

with cars, chips usually only produce good results with turbo or diesel motors. On N/A motors chips produce very little gains. They really only help remap the fuelling and power curves to compensate for extra air induction and sports exhausts or to reshape peaky power and torque curves to get better driveability. Cant see it workin on an outboard (and i love moding cars and boats!!) you could try nitrous!!!

tell ya crew to sit down 1st mind!

Daniel · 08 December 2003, 21:14

Quote:

Originally posted by gtflash
you could try nitrous

I have enough trouble staying in the boat already remeber!

Seriously, i though the humper said this WAS the case... comeon Stu what's the deal? Fact or gossip?

The Jackeens · 08 December 2003, 21:36

This came up on the Mariner site http://www.marinepower.com/

you have to then click on the tech forums and the question is listed.

From memory the carbs need changing

Rogue Wave · 08 December 2003, 22:04

My Scorpion was originally built for Nokia's PR company. and was owned by them for 9 months and Nokia pulled the plug. During this time it was maintained by Fairweather Marine, I was talking to Lee on eday and mentioned that I had bought the Nokia boat and he told me it had the ECU swapped out for one that had been meant for a 200.

That's all I know really

TIM · 10 December 2003, 18:38

I think rechipping a 2 stroke is a waste of time,
as the power curve, final hp and revs, are all controled buy the height of the exaust port , and when the transfer ports get cut off buy the piston.......

The new fuel injection units only eleminate the waste fuel, and can compinsate for flat spots etc, but it all limited by the amount of air you can get in on top of the piston before the ports shut and the fuel is injected..... OK Opti, ficht , Hdpi, all work slightly different.. same rules apply

Grinding a port 1.5mm higher can make a huge differance to the hp/ power curve, and then its down to exaust resienance, Ie the shock wave from the pistion is timed to exit the end of the exaust just as the next shock wave is happening at the head, this is so they dont slow each other down, thats why preformance, exausts look like spigitti so they are all the same lenght ..........

Bla bla bla....

Basicly NO it wont work very well on a 2 stroke......

Rupert Bear · 11 December 2003, 12:33

This has prompted me to ask much the same question. I have a 92 60 Yam and looking through the spec it seems to be identical to the 70 hp. What needs to be changed to get the extra 10 hp?

Pete7 · 11 December 2003, 16:12

Rupert, the main differences will be in the carbs and possibly th reed valves. On new engines the cost of buying a small engine and coverting it will always be more than buying the larger engine in the first place.

If you really want to make it go sell the 60 and put a Yam 90 on it. They are quite light and very robust engines just make sure it isn't one off a race boat.

Pete