starter fuse.

[old islander]

I have a 1978 mercruiser 898. I had a manifold leaking on the starter and it rusted out the starter fuse. When looking for a new one I found 2 listed for this motor. One is a 55amp fuse and the other is a 90 amp. Both look identical. So do I need the 55 or the 90? How do I know?

 

[Bt Doctur]

most are 90A for the system or the alt feed to the battery. the 50A is the CB mounted on the motor itself

 

[old islander]

This would be the square nylon block fuse the connects to the starter solenoid. It then has a whip on it that runs up to the slave solenoid.

 

[Fun Times]

Where are you looking that shows two different sizes on your engine model? Also there should be a color difference between the two. 55 might be red and 90 is white. Some model 3.0's used a 55 vs 90 amp starter fuse.

Item 34, http://www.mercruiserparts.com/selectSerailRange.asp?doc_nbr=Remote+Controls+and+Components

 

[old islander]

That's where I looked, Mercruiser parts.com. The diagram for the 898 shows the fuse. When I scroll down to that part # is shows both a 55 and a 90. They use the same picture for both and both are white. That's why I am confused. So I need the 90 then?