de-rated 6HP Evinrude?

[SnappingTurtle]

Re: de-rated 6HP Evinrude?

Hey Sandhammaren05!

Thanks for the feedback.

I was afraid that would the case. It would have been to easy just to unbolt, remove, and re-bolt a extra 1.5 horses to the little girl.

I have been looking for months online for Belgian made Evinrude parts list, to no avail. The local Marine tried to tell me my motor was never made. After a long discussion, they let me look at their old micro film files. There it was.

You can find the model years here: http://www.maxrules.com/OMC_models_files/1980_1999/6_9p9.html

This is a German guy that is slowly putting stuff up on the web, but it is not very complete.

http://www.old-omc.de/index2.html

A few parts are available from these guys, they are good for pat numbers.

https://www.onesourceboatingsupply.com/xref4.asp?p1=1&p2=1981&p3= 6 &p4= 6BFCI 0391875&p0=1

I have an address (that I copied from my Marinas address book when they weren't looking) in Wiesbaden now from a real Marina that still has parts from them but doesn't like to sell retail.

I will try to find the address for you. I just rearranged my office and saw it the other day in my reorganization efforts, but now that I am reorganized, I don't know what I did with it. I will post it as soon as I find it. They don't have a web site.

All I can say is that you can double to quadruple the American online prices for parts from them. The bad news is the old part numbers have been changed, and you can't find the new numbers, without the old ones on micro film.

BPR is no help what so ever.

Cheers!

 

[Sandhammaren05]

Re: de-rated 6HP Evinrude?

Thanks, but if you look at your post the web addresses got clipped! Can you please try again?
thanks,
Joe

PS Easy for me to buy the parts in U.S. once I find out the numbers. Alternative is to pick up another 6 cheap for spare parts, fall looks like a good time on ebay.de

 

[SnappingTurtle]

Re: de-rated 6HP Evinrude?

They work for me, but to be sure, I sent you a PM.

 

[Sandhammaren05]

Re: de-rated 6HP Evinrude?

Also, I see from photos you have a long shaft model, disadvantage on your small boats. You need to increase the transom height to get the cavitation plate even up with the boat bottom, worth more speed than increasing hp to 7.5 .... . Also, I prefer to bolt the motor on (one bolt on the right side for clockwise rotating prop), even small motors have been known to climb inside the boat if you hit something!

 

[SnappingTurtle]

Re: de-rated 6HP Evinrude?

It is actually a normal shaft, we compared it to a long shaft last weekend on a sailboat with the same motor and year. It was a good four inches longer.

Later in the day I raised it in steps of one half a inch, up to two inches on the transom and lost speed, not a little, a lot. It also cavitated at every small wave.

So back down and I could get it up on plane again.

 

[Sandhammaren05]

Re: de-rated 6HP Evinrude?

The difference between a 1981 Belgian OMC 6 and U.S. 7 hp is the (in former case restricted) intake manifold. Here are before and after shots of the Belgian 6 intake manifold, the latter after 15-20 min. with a rat-tail file. The pain in the --- is to get the starter spring back in the slot without breaking it (starter must be removed to remove carb and intake mfld.). I had to unwind and rewind the rope to get it in with tension (manual says wind it about 14 times, I wound about 8 times).

Last photo shows measuring transom height, will build a jack plate to set the motor above 17" height to get the cavitation plate above the waterline to reduce drag.

For parts list simply go to the BRP/Evinrude website and look up the 1981 7.5 hp. I buy most parts in Houston in fall and bring them over in Dec. Sometimes I order from 'Aunt Leigh' on Ebay.com and have the parts shipped here. 'Aunt Leigh' is both knowledgeable and helpful. I should add: I've needed no parts for the 6 other than an intake gasket, but I'm rebuilding a 1981 15 (shipped via LH Freight from Houston to Munich) and a 1980 35 bought on Ebay.de. The latter arrived with both sleeves separated from cylinder block due to overheating (waterpump impeller was 'welded' to the housing), so I had to find another block on Ebay.com. Will use the completely rebuilt Evinrude 15 on Hiddensee, and sell the completely rebuilt Johnson 35 in Germany.

Best wishes,
Joe

Hey Sandhammaren05!

Thanks for the feedback.

I was afraid that would the case. It would have been to easy just to unbolt, remove, and re-bolt a extra 1.5 horses to the little girl.

I have been looking for months online for Belgian made Evinrude parts list, to no avail. The local Marine tried to tell me my motor was never made. After a long discussion, they let me look at their old micro film files. There it was.

You can find the model years here: http://www.maxrules.com/OMC_models_files/1980_1999/6_9p9.html

This is a German guy that is slowly putting stuff up on the web, but it is not very complete.

http://www.old-omc.de/index2.html

A few parts are available from these guys, they are good for pat numbers.

https://www.onesourceboatingsupply.com/xref4.asp?p1=1&p2=1981&p3= 6 &p4= 6BFCI 0391875&p0=1

I have an address (that I copied from my Marinas address book when they weren't looking) in Wiesbaden now from a real Marina that still has parts from them but doesn't like to sell retail.

I will try to find the address for you. I just rearranged my office and saw it the other day in my reorganization efforts, but now that I am reorganized, I don't know what I did with it. I will post it as soon as I find it. They don't have a web site.

All I can say is that you can double to quadruple the American online prices for parts from them. The bad news is the old part numbers have been changed, and you can't find the new numbers, without the old ones on micro film.

BPR is no help what so ever.

Cheers!

 

[torbjorn]

Re: de-rated 6HP Evinrude?

I followed sandhammaren's advice and the result is dramatic. First, realize that 1.5 hp vs 6 hp is a 25% gain in power, like jumping from 60 hp to 75 hp. No 60 hp motor will run with a 75.

We have a 350 lb boat, with the 6 hp motor the boat wouldn't plane, speed was about 12 mph. Planning makes a big speed difference: with the 7.5 hp 'upgraded 6' the boat planes fast, runs 16 mph with me and our two teenage sons in the boat! The same boat runs 26 mph with an early 1980s model 15 hp Johnson. The only problem is that with 7.5 hp the boat won't plane running into strong wind and big waves, so I'm depitching the stock 9" pitch prop to 8".