1991 Fast Strike SilverStar 90 or 60 degree?

[cdnfthree2]

I have a 1991 Fast Strike SilverStar 150 hp motor.
J150GLEIS Ser-G02642331
I found a boat shop that will sell me a OEM repair manual (They don't make em anymore so I hear). They need to know if it is a 60 or 90 degree motor. I would think the obvious answer would be 90, buy I really don't know what they are refering to. I figured they'd know what it was based on serial number, but they don't. Can a few of ya'll help me out?

 

[HighTrim]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

The 1 difference that you will need to know is that there are looper design and crossflow design heads. The difference has to do with the way the fuel is introduced into & across the cylinder. The difference between the 90 degree and 60 degree heads has to do with the positioning of the cylinders in relation to the crank centerline. Imagine an axis where the crank centerline is the baseline if you will, and the cylinder is a radii off the central axis. The looper is the newer, updated style, and is suppose to be more fuel efficient posess more torque.

A Crossflow has a wedge shape on the top of the pistons, so that the incoming mixture gets deflected by that wedge upwards and pushes the exhaust gasses out.

A looper achieves the same thing without the wedge, it uses the ports to "flow" the new mixture to the top of the head, in a "loop" so to speak.

The following was taken from a post by Mr Hadley, explaining the 60 degree and 90 degree models. He is very knowledgeable in this field.

"Certain looper models like the 200 / 225 / 250 / 275 / 300 have always been 90*. Other models like the 150 / 175 (Eagle series) loopers have always been 60* models.

The 120 /130 /135 /140 loopers have always been 90*. The 90 & 115 loopers are 60* blocks.

V4 & V6 crossflows have always been 90* blocks."

You can also go to www.shop.evinrude.com to view the exploded view of the head to determine if it is in fact a 60* or 90*

 

[HighTrim]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

There are also plenty of OEM Service Manuals available on www.ebay.com, or www.outboardbooks.com for factory reprints.

You can also check right here on iboats.

 

[clanton]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

It should be a 60 degree engine

 

[cdnfthree2]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

I appreciate all the info everyone. I'm slowly learning about this thing. Hopefully I'll get it together in this motors lifetime. Thanks again

 

[dajohnson53]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

I have a 1991 Fast Strike SilverStar 150 hp motor.
J150GLEIS Ser-G02642331
I found a boat shop that will sell me a OEM repair manual (They don't make em anymore so I hear). They need to know if it is a 60 or 90 degree motor. I would think the obvious answer would be 90, buy I really don't know what they are refering to. I figured they'd know what it was based on serial number, but they don't. Can a few of ya'll help me out?

#1: no they don't need to know that. All they need to know is the model number which you have given them. That will determine what book to get. No need to know degrees ahead of time.

#2 the OEM manuals are readily available. I may be a cynic, but it sounds like your local boat shop either doesn't know what they're talking about on this subject, or is trying to BS you.

 

[cdnfthree2]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

Thanks dajohnson53. In light of that, and the fact that they put a brand new tilt and trim SYSTEM on my buddies boat that causes steering rod to chew the transom if the motor is up (All the original needed was an armature), I think I should just stay away from there.

 

[Dhadley]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

I agree. If they don't know what a 91 150 is I'd stay away too.

As for your buddys motor, if he has a motor like yours there is a tilt limit switch. Since (I assume) it didn't hit before, it shouldn't hit now. However, if it didn't hit before and does now, they may have put the motor back on too low.

 

[cdnfthree2]

Re: 1991 Fast Strike SilverStar 90 or 60 degree?

Dhadley, The motor didn't hit before because it was the original mercury tilt and trim with the original transom mounts. The steering arm cleared it by about 2 inches up or down. Instead of fixing the tilt-trim motor, which parts are readily available for, they ordered a brand new system with this massive aluminum hinge plate that pushed the motor back another 3 inches at the same height. They put the lock pin in and mounted the motor to this. Now, when trailering the boat the steering has to be turned hard right or damage will occur. They take no responsibility and said that they don't try to save anything that has been near saltwater beacause that's probably why it doesn't work now and that they'd just rather not work on a salt water boat at all. I think we're both done with them.