I/O characteristics?

[Fishermark]

Re: I/O characteristics?

The 2.5 liter "Iron Duke" motor is 120 HP. The 3.0 liter (still a straight four) is 140 hp. (They look the same on the outside - ask me how I know! ) The 3 liter has a 4" bore (like a 350) and the 2.5 liter has approx. a 3.8" bore - (like a 305).<br /><br />Just for information regarding the performance of this motor - My Dad and I both have Sportcraft boats. Mine is a 24.6' Offshore Walkaround, while his is an 18' Walk-through. I have the 350 with an Alpha 1 in my boat, while he only has the 2.5 liter 120 HP with an Alpha 1 in his. Having said that, he can run circles around me with that combination. I don't know how heavy his boat is, but it does have some thick fiberglass, and it still runs very nice with that combination.

 

[mellowyellow]

Re: I/O characteristics?

thanks mark,<br />now the only question is: is the 165 and 185hp<br />also an inline 4cyl? all take same outdrive?<br />good education <br />M.Y.

 

[Bondo]

Re: I/O characteristics?

"now the only question is: is the 165 and 185hp also an inline 4cyl? all take same outdrive?" <br />Could be the old 470, 4cyls...w/1.84/1 ratio<br />Could be the I6 Chevy....w/1.65/1 ratio<br />Only the 120s,+ 140s use the 1.98/1 ratio<br />Both of these motors were listed at these Horsepowers...<br />All the Same outdrive, with different top gears....<br />My boat was already set-up for the I6, as far as the engine box extended way passed the I4....<br />4.3ls didn't come on to the scene till about 1983.....<br />

Bondo, that's quite a trip from you to me! as u<br />know, lake ontario can be quite rough at times.<br />where did you end up? Sodus Point?

Yes, It Sure Can get Rough... I've ridden out T-storms out there... With Confidence, I might add.... I Really Love my Islander, with the Exception of it's Rough Ride motoring Into the wind....<br />End-Up ??? back at Sackets Harbor... We had gone out into the main lake to bounce bottom for Lake Trout.....

 

[mellowyellow]

Re: I/O characteristics?

good testimonial Bondo, not a trip u take lightly.<br />appreciate it v.much!<br /><br />according to the seller, (who has orig. papers <br />it's an iron duke 120hp 2.5L chebby. <br />orig. titled to the "Wegmann's" family in 1,000<br />islands new bondo (own large supermarket chain here)<br /><br />u can always count on the good folks here for help!<br />thank you, I have learned a lot