Just doing some routine maintenance and wanted to share my experience for anyone contemplating aluminum manifolds and risers. These pics are from today after 5 full seasons in the salt from April to December. Full closed cooling system so manifolds have coolant in them but risers are raw water...
Mercruiser 5.7 1999 converted to full closed cooling this year when I installed new 5.7 long block and new manifolds and risers.
Everything worked great San juan full kit. I used the block off gaskets supplied with the kit. They were soft graphite like merc's. Till today Seawater in the block...
Finished the repower of my boat with a 5.7 and added a full closed cooling kit. Block and manifolds. I can't believe the difference from the 5.0 and raw water cooling. The temp is much more stable and the motor just seems to run better.
1999 5.7 mercruiser alpha gen2
My question is Can I...
I have a 1999 alpha gen 2 That I am repowering from a 5.0 to a 5.7. I replaced the coupler and the kit I got had new hardware in it. When I installed the coupler to the flywheel I used the included hardware It had the flat trapazoid washer and a lockwasher for each bolt. Only when I installed...
On my 1999 Alpha gen 2 5.0L I noticed inside the gimbal housing and upper unit There is some corrosion pits in the aluminum. In the upper unit I scraped the corrosion and the hole was about 1/4 inch deep. Pics below. The drive is about 1 inch thick here but I am a little concerned. In the...
I have thought about building a swim platform for my boat, 24 foot single sterndrive walkaround. My transom is straight and I was going to just set the platform off the transom a 1/4 inch on stainless brackets. (Instead of bolting directly to transom.) I am mostly doing this for a few reasons...
I have a slight ping at Wot 4700 to 4800 rpm. No pinging throughout rpm and throttle settings. Even from when going wot from idle it only pings at the last 5 to 10% of throttle. If I back it down a little it goes away and I can run like that for a long time with no ping. I also can hit the rev...
On my 99 5.0 carb alpha there is a sender for the gauge and a sensor that is connected to the alarm. It looks like a normal GM coolant sensor. Is this only for the alarm or is it also connected to the Thunderbolt ignition? I need to replace it cause the alarm was acting up the motor temp was...
The belt on this motor (standard cooling) will run fine for about 25 hours then it gets thrown off and gets shreddded. I have checked all the accessories and they are fine. If I swap on a new belt it runs true on all the pulleys. The second time this happened I checked the tension every morning...
Mercruiser offers a Compact hyd steering option on new motors for 429.00 I was wondering if I could purchase it in a kit form?
Does anyone make a hyd steering system instead of a cable?
I want to add a auto pilot this year and it seems much better to have hyd steering than a cable as the...
I am replacing my manifolds this spring. Any benifit to replacing the shutters at the same time? No problems now but just want to know if its normal preventive maint.
I am going thu a 220 for a friend and have removed the carbs to go thru them. He told me it idles bad but I have only run the motor on muffs to warm up and do a compression test. While going thru the carbs I figured I would just check the rest of the motor. I tested the recirc valves and they...
Last fall before I winterized the boat I did all the bellows, the shift cable, and a gimbal bearing also the water hose and gear lube hose. I adjusted the cable in the fall out of the water and did not get to try shifting it till spring.
This spring I followed the factory manual and adjusted...
99 Alpha drive.Approx 200hrs, Its been wet slipped summers from 1999 to 2002, then out of the water winterized till last june when I purchased the boat. I commisioned it last year and trailered it the whole year cause of all the work I wanted to do to it. Now got her back in tip top shape and I...
I have a 1999 seamaster walkaround, I really like the boat and was wondering what improvements I would see with going to the mercruiser 4bbl manifold and a q jet carb. Would I lose some mpg? How much power gain could I see?
I am not looking for top speed just a little more low end for rough...
