fish nautique prop rotation

Good picture Larry of a transmission set up for a RH reverse rotating engine. Some also say RH or LH next to the arrow.

Harold Here's a thread about posting pictures, the first post tells how

posting pictures

This gets very confusing because I was there and helped to pull this motor and trans out of the old boat as an assembly. Now looking at the trans pump it is clearly set up for a right hand rotation but the eng is for sure a standard rotation. There is no way that I can see for this combo to have ever worked. The only thing I can figure is someone who did not know what they were doing put the wrong eng and trans together and could not get it to work so that is why the boat sat and was being scrapped. Another thing I found that suggests they did not know very much as mechanics was when I tore the eng down the rings were .030 undersize for the pistons. The ring gaps were about .050 and should have been no more than .020 at most. There would have been tremendous blow by and pressure in the crank case. I built high performance engs for years and I am 72 now and I have to shake my head at some of the things I have seen some people do. It looks like to me that I will finish the eng build as a standard rotation and index the pump so it is turning in the proper direction and hope there is no damage to the trans and change the prop to a LH. I still welcome any help and advice from everyone. Now I have to find a LH prop.

Is there a place on the site I should look for a LH prop??? Does anyone know what the standard factory prop was on the 86 Fish Nautique?

First one should be IMG not IGM

Gary S wrote: Is the engine still apart? Some pictures of the crank where the rear seal runs would be nice. Lefty and righty cranks had different direction wick lines at one time. When spun opposite they will cause the seal to leak.

Considering the iregularities, I agree that a look at the wick lines is a good idea.

No, No Duane

I was gonna take your engine apart but luckily you have a picture already

Here are some of the things going into the new eng build

If you put this motor in a FN you will need to put 4 inch spacer,s on the exhaust manifolds or you will have water coming back into the motor. You will need a 14x11x1/18 left hand prop. I might have one at the store. FYI the rear main seal was changed about 1983 and the hash marks went away on the crankshaft and seal took care of it. Same crank used LH or RH.

As for the cam screw as I understand it is to the outside away from the eng. The photo showing the raw water pump is just as it was when we pulled it. I am so thankful to all who are helping because there is so much I do not know about all this.

woodyelc wrote: If you put this motor in a FN you will need to put 4 inch spacer,s on the exhaust manifolds or you will have water coming back into the motor..

Spacers? Where, between the manifolds and risers? Please explain.

Gary S wrote: I would venture to guess between the riser and pyramid manifold Pete. That motor looks to sit kinda low in the boat. Backing down and a following sea could get water in the engine. Mufflers might help but you guys don't like them.....

My guess as well but just asking for a confirmation.

Looks like a late 90s engine which would naturally be LH. Someone definitely screwed up and probably why it's in your hands now.

Raw water pump is upside down.

Yes Fish 23' had a 1.125 diameter shaft.

Use flappers on the exhaust outlets

are you recommending against using them?