Boat is at the shop.....still no smoking gun.....

gidds

Seaman Apprentice
Joined
Jul 14, 2007
Messages
48
Re: Boat is at the shop.....still no smoking gun.....UPDATE

Re: Boat is at the shop.....still no smoking gun.....UPDATE

Long story short.....

I headed out on the four hour drive a couple of Sundays ago. Meet Wayne (Clams) on a Monday and we quickly stripped down my powerhead and installed a rebuit one. One small hiccup kept us from finishing in one day, however it was awsome to break down everything down and build it back up again. We spent some time out on the lake on the extra day and came up with additional issues that I was having.......

1) When we removed the powerhead the exhaust divider was broken and the top part (from the side bolts up) was loose. It was blocking a majority of the exhaust path. We removed the part and he seemed to think that it was not necessary to replace as the later models dividers kept getting shorter and shorter. Any input?

2) We both seem to think the boat was heavy (possibly waterlogged). I am going to try to take it to the landfill or a close truckstop to see if they have a scale I can use. The boat is supposed to be 850#, motor 350#, trailer 200-300# plus another 400# seats and persons. With that being said, I had a 19" uncupped prop. We put on a 17" and got the RPM's to go over the hump of 3000K. Got pretty good speed ~30mph? but I think it should do more...... I have installed a 15" and will hopefully try tomorrow if it isnt too cold.

I will try to post some pics that I took sometime in the near future.

I cannot thank Wayne enough for his time and assistance.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Boat is at the shop.....still no smoking gun.....

Sounds like you've done the right thing. I love those old in-lines, best engines ever built. When you go testing for the right prop, just remember that they HATE being over-propped. You'll cook a cylinder in a blink if you do.

One of the things to consider if you do change the engine in the future is the weight of the new engine. There hasn't been an engine made that can match these in-lines power to weight ratio. My brother changed from a 90hp in-line six to a new (in 1996) 3 cylinder 90hp Merc and added 36kg (80lbs) extra weight with the new engine. If you consider the 4-strokes it gets even worse!

Chris..........
 
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