Putting in brand new 5.7L engine in Sea Ray. Help!

[Earl_Dame]

Hi:<br /><br />I'm getting ready to put in 2 brand new 5.7L inboard engines into my 1985 SeaRay 300 Weekender. <br /><br />I need any info or advice on doing the engine swap. My main concern is compatibility between a circa mid 1980's engine with a 1997 engine, both being mercruisers.<br /><br />Please let me know about internet sources or good books for a job of this type.<br /><br />Thanks.<br /><br />ED

 

[trevorcday]

Re: Putting in brand new 5.7L engine in Sea Ray. Help!

Make sure that the engine couplers are the same style. Merc came out with a new engine coupler with a grease fitting in the late 90's which required a change to the driveshaft. If the engines you are getting have the newer coupler they won't accept the shaft on your older drives.

 

[Earl_Dame]

Re: Putting in brand new 5.7L engine in Sea Ray. Help!

Thanks for the feedback.<br /><br />I'm pretty knowledgeable with car applications with small blocks, but not with marine applications. <br /><br />Other than the engine coupler, what else could cause problems between the '85 engine and the new '97 engine I'm going to install?<br /><br />Are the wiring harnesses the same? <br /><br />Thanks so much for your help.<br /><br />Cheers,<br />Ed