84 Starcraft Islander 26ft / 3.7Mercruiser rebuild

[sronza]

I am rebuilding an 84 Starcraft Islander.
Engine 3.7Mercruiser
Adding holley sniper

 

[Scott Danforth]

you have multiple threads on the same topic

 

[jbcurt00]

Use this topic for documenting resto work on the hull or Mods you're making to the layout.

Keep the Mercruiser motor work in your Mercruiser topic:

Mercruiser 3.7 / 470 Holley EFI Sniper.

I am rebuilding a 1984 starcraft 26ft aluminum islander with 3.7 inboard. head has been built with new valves and long block complete. All stock. I am adding an alternator and a Holley sniper EFI. Has anyone done the Holly on this engine.

forums.iboats.com

Best not to duplicate topics

 

[sronza]

Heres an update. Boat is going back together now. Engine is in. Floors Aluminum are in and rivets installed.

 

[sronza]

More interior floor pics

 

[sronza]

cut outs in transom to access swim platform And make boat more beach friendly.

 

[zool]

cut outs in transom to access swim platform And make boat more beach friendly.

You gonna add splash wells to the cutouts?

 

[sronza]

Yes. they will slide in and out.

 

[sronza]

Heres the latest.
Ive completed the wrap. Ive also been running the boat for a couple weeks now and its running pretty good.

 

[sronza]

Heres another photo

 

[sronza]

Im using the original 3.7 mercruiser.
Ive updated everything I could.
So far I like the motor. It has a lot of torque.Its. Its no speed demon but it gets up on plane immediately than cruises at 25 mph at 3500rpm.
…….but. The wiring on this boat is so bad.
the harness itself has degraded beyond explanation. The wire itself inside the harness is bad. As well as the plugs inside. At the pins.
I could write a novel on what Ive learned.
Just on wiring. If you have a 3.7 most people would probably blame engine trouble On the 3.7 when in fact it is probably bad wiring.

 

[sronza]

Heres the walk out transom mods.Swim platform is under construction now. Pics to come soon.

 

[sronza]

Heres my engine customization. I removed the water pump shaft from camshaft. I than counterbored the timing chain sprocket to accept new stainless stub shaft.this is a slide fit with less than .002“ run out. I used 318 stainless because it is hard and should stand up to seal wear better than original.

 

[Scott06]

Heres my engine customization. I removed the water pump shaft from camshaft. I than counterbored the timing chain sprocket to accept new stainless stub shaft.this is a slide fit with less than .002“ run out. I used 318 stainless because it is hard and should stand up to seal wear better than original.

Nice fix will be interested to see how it holds up.