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Trying to identify engine and get manual

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brandong

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"I am trying to track down wha

"I am trying to track down what kind of engine I have in my 1974 Glasply model 19100. There is no serial number plate anywhere on the engine and the only numbers I have been able to find are the block number 2770087 and 42673C1 on the oposite side of the engine from the distributor. I want to get a manual so that I can finish my fix-ups and any help would be greatly appreciated. I have included a few pictures in hopes that will help.
253229.jpg
253230.jpg
253231.jpg
"
 
"Well its either a Mercruiser

"Well its either a Mercruiser 110/120 or 140HP engine, I'd go with a 140 based on the INT/EXH manifold design"
 
"there is a PAD next to the di

"there is a PAD next to the dist with some numbers stamped on it, are the "42673C1" from there ? because the number doesn't match.

The 2770087 is a GM Casting number, but that size block is used on 2.5 and 3.0L engines 110/120/140hp

140 GM 181 I/L4 1972-1978
Serial number 3332138 THRU 5157668

120 GM 153 I/L4 1972-1978
Serial number 3377341 THRU 5192048"
 
"No, the 42673C1 numbers are f

"No, the 42673C1 numbers are from the port side of the engine. The little pad there had 3 numbers on it, but it is so old that they are not readable. I have attached a picture of the port side showing where the 42673C1 is stamped.
253253.jpg
"
 
"the right side or starboard s

"the right side or starboard side where the distributor is, is where you want to look for the numbers, try cleaning with a scotch pad. any other numbers on the block wont help, especially from the left side or port side."
 
"Yes, that is correct, this ha

"Yes, that is correct, this has fresh water cooling.

I will clean away and see if I can pull any more numbers off the starboard side.

Thanks again."
 
"Ayuh,...

Just look at the

"Ayuh,...

Just look at the crankshaft pulley...
If it's the 2.5l, it's Just a Pulley...
If it's a 3.0l,.. There's the Pulley,+ a Harmonic Balancer..."
 
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