mercruiser 3 ltr swap with 4.3ltr

[wenzupacelli]

Hi I have a rinker 182 with merc 3 l and would like to install a 4.3 the boat have engine supports for the v6 but the problem is that the v6 does not fit in the engine comp hatch for 1 inch on both sides(manifolds too wide)i was looking to get these one piece aluminium manifolds but i dont know if i will get that 1 inch from both side to make it fit.

any suggestions someone!!!!!!!!!!!!!

 

[Bondo]

Re: mercruiser 3 ltr swap with 4.3ltr

Ayuh,... Changing manifolds will Not help...

 

[Don S]

Re: mercruiser 3 ltr swap with 4.3ltr

You are also going to need an exhaust Y that attaches to your transom shield, and don't forget to change the gear ratio in your outdrive.

 

[achris]

Re: mercruiser 3 ltr swap with 4.3ltr

... the problem is that the v6 does not fit in the engine comp hatch for 1 inch on both sides(manifolds too wide)...

If it's a fibreglass hatch, just cut it down the centre and widen it by 2". Set a sheet of ali in the middle and start glassing.

 

[180shabah]

Re: mercruiser 3 ltr swap with 4.3ltr

If it's a fibreglass hatch, just cut it down the centre and widen it by 2". Set a sheet of ali in the middle and start glassing.

Agreed, make the lid bigger, BTW - achris, good to see you active again.

 

[ENSIGN]

Re: mercruiser 3 ltr swap with 4.3ltr

Make sure to leave enough room for repairs and maintinance(plugs,starter,winterizing) It would be a shame to have to pull the engine out just to do a tune up.

 

[Bronc Rider]

Re: mercruiser 3 ltr swap with 4.3ltr

Adding some width to the dog house is a good idea.

One thing I have noticed on some of the smaller new boats is that the seating arrangement has to be different for certain engines. For example, the 3.0 on some boats can be had with this type of seating:

On some models if you upgrade to a 4.3 or bigger they make you get the second pic type of seating arrangement.

The second pic would require you to completely change the back seating of your boat. It might not be worth it but it might make engine access better. As ENSIGN points out, you're going to want to be able to reach parts that require service. On some boats the whole bench seat and lounging/tanning area can be on one hinge. Easy engine access on a set up like that.

 

[jkust]

Re: mercruiser 3 ltr swap with 4.3ltr

What year is you Rinker?