I am picking up a Chrysler 908h4 (1984 90hp 4cyl) for a $100. Comes with controls, and extra tilt/trim pumps. It runs but has a lower unit issue which may be the dog legs on the sliding clutch. This will be replacing my 1969 Merc 800 (66cu/in), I am just tired of having to manually tilt the engine when I launch or retrieve the boat out of the water.
With my wife and a light load in the boat (no fuel in the forward tank) @ 5300~5400 with a 13x17p we do about 33~4 mph average (according to my gps) lower unit is a 2.33:1 ratio. Anyways the merc runs good but I am underwhelmed by its top end performance, It runs more like a modern (prop rated) 65-70hp.
The chrysler will be a winter project and I am planing on doing a complete teardown and restoration on it. They look real eazy to work on.. On the merc to get the starter out you have to remove the distributor then carbs.
I have been reading as many of Franks posts as I can. (RIP frank, I wish u were still around to ask questions) From what I understand this motor used to be rated as a 105 and down rated in 83-84 as prop rated.
My plan is to use the TC carbs, manifolds and reeds form a force 125. Also "square up" the bypass ports. I have a tig welder and may look at putting in a divider in the exhaust to separate cyls 1-2 from 3-4 so that the exhaust ports can be opened up slightly.. What I hope to accomplish is an honest 110hp at the prop and hopefully outperform the old merc 800..
I am open for suggestions,
robert.
With my wife and a light load in the boat (no fuel in the forward tank) @ 5300~5400 with a 13x17p we do about 33~4 mph average (according to my gps) lower unit is a 2.33:1 ratio. Anyways the merc runs good but I am underwhelmed by its top end performance, It runs more like a modern (prop rated) 65-70hp.
The chrysler will be a winter project and I am planing on doing a complete teardown and restoration on it. They look real eazy to work on.. On the merc to get the starter out you have to remove the distributor then carbs.
I have been reading as many of Franks posts as I can. (RIP frank, I wish u were still around to ask questions) From what I understand this motor used to be rated as a 105 and down rated in 83-84 as prop rated.
My plan is to use the TC carbs, manifolds and reeds form a force 125. Also "square up" the bypass ports. I have a tig welder and may look at putting in a divider in the exhaust to separate cyls 1-2 from 3-4 so that the exhaust ports can be opened up slightly.. What I hope to accomplish is an honest 110hp at the prop and hopefully outperform the old merc 800..
I am open for suggestions,
robert.