replace piston cant find what 1???

[17bowrider]

hello me again just got done taring down my 150 evinrude to replace piston BUT cant find right piston on internet? the numbers i have found on the piston are? 49652-a 1ac and 434 503? help model # is E150NXETG ??

 

[RadarRick]

Re: replace piston cant find what 1???

I'm not sure if this is what you're looking for, but the stock pistons part numbers for your model are:

0436243 Starboard
0436242 Port

please verify this before ordering

 

[17bowrider]

Re: replace piston cant find what 1???

how will i know if it is? i need middle on port side?

 

[Joe Reeves]

Re: replace piston cant find what 1???

All of the pistons on the port side are as Rick states.

Port piston = 426242 (Standard), 426312 (.030 Oversize)

Piston Rings = 436353 (Standard), 436354 (.030 Oversize)

If the cylinder wall are perfect = Standard.

If the cylinder wall is scored = .030 oversize.

 

[17bowrider]

Re: replace piston cant find what 1???

oh ok thanks guys really big help but one more question with model number can u tell what year this motor is? thanks again

 

[Joe Reeves]

Re: replace piston cant find what 1???

OMC's code is the word INTRODUCES whereas each letter stands for a number... I=1, N=2,T=3, etc.

The ET within your model number of E150NX"ET"G indicates that your engine is a 93 (1993) model.

 

[RadarRick]

Re: replace piston cant find what 1???

The pistons seem to have non-stock numbers. Could this have been re-bored and larger pistons installed? Is it worth checking the bore measurement just to be sure.

 

[Joe Reeves]

Re: replace piston cant find what 1???

Bowrider.... The number you state in your first post (49652-a 1ac and 434 503). Are they by any chance number on the underside of the pistons? If so, they're most likely simply casting numbers.

 

[17bowrider]

Re: replace piston cant find what 1???

yes the #'s are under the piston how can i tell if it was bored i just bought it from fisheries they dont know anything about it i cant find any other numbers i measured it with a tape measure and it is 3 1/2 inches now i know its not the right tool but its close so what do i do now?

 

[Joe Reeves]

Re: replace piston cant find what 1???

The differnce between a standard bore and one being just .030 oversize would be impossible to measure except by a experienced professional with the proper tools.

If the engine has a oversize bore, it would also of course have a oversize piston, in which case the piston would have the size imbedded on the top of it.

Examine the top of the piston closely. If oversized, the size will be there.

 

[17bowrider]

Re: replace piston cant find what 1???

ok found this number on top of piston under the one that busted L4 4503 01/18/3A now not sure if there is a number missing between the L4 and the 4503 or not? cant tell ?so whats this number mean?

 

[wilde1j]

Re: replace piston cant find what 1???

Have someone measure the bore of the cylinder. That will tell the story of the piston size.

 

[Joe Reeves]

Re: replace piston cant find what 1???

Sorry, I have no idea what those numbers mean.

 

[Chinewalker]

Re: replace piston cant find what 1???

As noted, the numbers are merely casting numbers and may or may not have any correlation to a part number.

 

[17bowrider]

Re: replace piston cant find what 1???

ok off to see machine shops? thanks